23031538 has 8 divisors (see below), whose sum is σ = 35481132. Its totient is φ = 11204496.

The previous prime is 23031529. The next prime is 23031559. The reversal of 23031538 is 83513032.

It can be written as a sum of positive squares in 2 ways, for example, as 22877089 + 154449 = 4783^2 + 393^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155545 + ... + 155692.

Almost surely, 2^23031538 is an apocalyptic number.

23031538 is a deficient number, since it is larger than the sum of its proper divisors (12449594).

23031538 is a wasteful number, since it uses less digits than its factorization.

23031538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311276.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 23031538 is about 4799.1184607176. The cubic root of 23031538 is about 284.5166239464.

The spelling of 23031538 in words is "twenty-three million, thirty-one thousand, five hundred thirty-eight".