23150531 has 4 divisors (see below), whose sum is σ = 24369000. Its totient is φ = 21932064.

The previous prime is 23150509. The next prime is 23150539. The reversal of 23150531 is 13505132.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 23150531 - 2⁶ = 23150467 is a prime.

It is a super-2 number, since 2×23150531² = 1071894171163922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23150539) 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, 609206 + ... + 609243.

It is an arithmetic number, because the mean of its divisors is an integer number (6092250).

Almost surely, 2^23150531 is an apocalyptic number.

23150531 is a deficient number, since it is larger than the sum of its proper divisors (1218469).

23150531 is a wasteful number, since it uses less digits than its factorization.

23150531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218468.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 23150531 is about 4811.4998701029. The cubic root of 23150531 is about 285.0057698637.

Adding to 23150531 its reverse (13505132), we get a palindrome (36655663).

The spelling of 23150531 in words is "twenty-three million, one hundred fifty thousand, five hundred thirty-one".