23031156 has 24 divisors (see below), whose sum is σ = 53835040. Its totient is φ = 7663392.

The previous prime is 23031121. The next prime is 23031157. The reversal of 23031156 is 65113032.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23031157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7155 + ... + 9861.

Almost surely, 2^23031156 is an apocalyptic number.

It is an amenable number.

23031156 is an abundant number, since it is smaller than the sum of its proper divisors (30803884).

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

23031156 is a wasteful number, since it uses less digits than its factorization.

23031156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3423 (or 3421 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 23031156 is about 4799.0786615766. The cubic root of 23031156 is about 284.5150509446.

Adding to 23031156 its reverse (65113032), we get a palindrome (88144188).

The spelling of 23031156 in words is "twenty-three million, thirty-one thousand, one hundred fifty-six".