23031312 has 40 divisors (see below), whose sum is σ = 59761056. Its totient is φ = 7643136.

The previous prime is 23031301. The next prime is 23031313. The reversal of 23031312 is 21313032.

23031312 = T₃ + T₄ + ... + T₅₁₆.

It is a junction number, because it is equal to n+sod(n) for n = 23031291 and 23031300.

It is not an unprimeable number, because it can be changed into a prime (23031313) 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 7 ways as a sum of consecutive naturals, for example, 11403 + ... + 13269.

Almost surely, 2^23031312 is an apocalyptic number.

It is an amenable number.

23031312 is an abundant number, since it is smaller than the sum of its proper divisors (36729744).

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

23031312 is a wasteful number, since it uses less digits than its factorization.

23031312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2135 (or 2129 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 23031312 is about 4799.0949146688. The cubic root of 23031312 is about 284.5156933244.

Adding to 23031312 its reverse (21313032), we get a palindrome (44344344).

The spelling of 23031312 in words is "twenty-three million, thirty-one thousand, three hundred twelve".