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11200231 = 71600033
BaseRepresentation
bin101010101110…
…011011100111
3210002000211101
4222232123213
510331401411
61040020531
7164125510
oct52563347
923060741
1011200231
11635a999
123901747
132421c73
1416b7a07
15eb38c1
hexaae6e7

11200231 has 4 divisors (see below), whose sum is σ = 12800272. Its totient is φ = 9600192.

The previous prime is 11200213. The next prime is 11200237. The reversal of 11200231 is 13200211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13200211 = 17776483.

It is not a de Polignac number, because 11200231 - 211 = 11198183 is a prime.

It is a super-2 number, since 2×112002312 = 250890348906722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11200237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 800010 + ... + 800023.

It is an arithmetic number, because the mean of its divisors is an integer number (3200068).

Almost surely, 211200231 is an apocalyptic number.

11200231 is a deficient number, since it is larger than the sum of its proper divisors (1600041).

11200231 is an equidigital number, since it uses as much as digits as its factorization.

11200231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600040.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 11200231 is about 3346.6746181844. The cubic root of 11200231 is about 223.7393266030.

Adding to 11200231 its reverse (13200211), we get a palindrome (24400442).

The spelling of 11200231 in words is "eleven million, two hundred thousand, two hundred thirty-one".

Divisors: 1 7 1600033 11200231