23238531 has 6 divisors (see below), whose sum is σ = 33566780. Its totient is φ = 15492348.

The previous prime is 23238503. The next prime is 23238557. The reversal of 23238531 is 13583232.

It is not a de Polignac number, because 23238531 - 2¹⁷ = 23107459 is a prime.

It is a super-2 number, since 2×23238531² = 1080058646075922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23238495 and 23238504.

It is not an unprimeable number, because it can be changed into a prime (23238731) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1291021 + ... + 1291038.

Almost surely, 2^23238531 is an apocalyptic number.

23238531 is a deficient number, since it is larger than the sum of its proper divisors (10328249).

23238531 is a wasteful number, since it uses less digits than its factorization.

23238531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2582065 (or 2582062 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 23238531 is about 4820.6359538965. The cubic root of 23238531 is about 285.3664353986.

The spelling of 23238531 in words is "twenty-three million, two hundred thirty-eight thousand, five hundred thirty-one".