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23115500 = 225383557
BaseRepresentation
bin101100000101…
…1011011101100
31121111101111122
41120023123230
521404144000
62143240112
7400323062
oct130133354
947441448
1023115500
1112059021
1278a9038
134a34515
1430da032
152069085
hex160b6ec

23115500 has 48 divisors (see below), whose sum is σ = 51184224. Its totient is φ = 9118400.

The previous prime is 23115497. The next prime is 23115503. The reversal of 23115500 is 551132.

It is an interprime number because it is at equal distance from previous prime (23115497) and next prime (23115503).

It is not an unprimeable number, because it can be changed into a prime (23115503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41222 + ... + 41778.

It is an arithmetic number, because the mean of its divisors is an integer number (1066338).

Almost surely, 223115500 is an apocalyptic number.

23115500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23115500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25592112).

23115500 is an abundant number, since it is smaller than the sum of its proper divisors (28068724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23115500 is a wasteful number, since it uses less digits than its factorization.

23115500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659 (or 647 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 23115500 is about 4807.8581509857. The cubic root of 23115500 is about 284.8619419568.

Adding to 23115500 its reverse (551132), we get a palindrome (23666632).

The spelling of 23115500 in words is "twenty-three million, one hundred fifteen thousand, five hundred".