23130000 has 150 divisors (see below), whose sum is σ = 81203694. Its totient is φ = 6144000.

The previous prime is 23129993. The next prime is 23130007. The reversal of 23130000 is 3132.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (23129993) and next prime (23130007).

It can be written as a sum of positive squares in 5 ways, for example, as 2663424 + 20466576 = 1632^2 + 4524^2 .

It is a tau number, because it is divible by the number of its divisors (150).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23130007) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 89872 + ... + 90128.

Almost surely, 2^23130000 is an apocalyptic number.

23130000 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 23130000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40601847).

23130000 is an abundant number, since it is smaller than the sum of its proper divisors (58073694).

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

23130000 is a wasteful number, since it uses less digits than its factorization.

23130000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 9.

The square root of 23130000 is about 4809.3658625644. The cubic root of 23130000 is about 284.9214926881.

Adding to 23130000 its reverse (3132), we get a palindrome (23133132).

The spelling of 23130000 in words is "twenty-three million, one hundred thirty thousand".