23281957 has 4 divisors (see below), whose sum is σ = 24294240. Its totient is φ = 22269676.

The previous prime is 23281949. The next prime is 23281969. The reversal of 23281957 is 75918232.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 23281957 - 2³ = 23281949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23281057) 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, 506107 + ... + 506152.

It is an arithmetic number, because the mean of its divisors is an integer number (6073560).

Almost surely, 2^23281957 is an apocalyptic number.

It is an amenable number.

23281957 is a deficient number, since it is larger than the sum of its proper divisors (1012283).

23281957 is a wasteful number, since it uses less digits than its factorization.

23281957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012282.

The product of its digits is 30240, while the sum is 37.

The square root of 23281957 is about 4825.1380291138. The cubic root of 23281957 is about 285.5440801849.

The spelling of 23281957 in words is "twenty-three million, two hundred eighty-one thousand, nine hundred fifty-seven".