23190531 has 16 divisors (see below), whose sum is σ = 38056704. Its totient is φ = 12232224.

The previous prime is 23190491. The next prime is 23190539. The reversal of 23190531 is 13509132.

It is a happy number.

It is not a de Polignac number, because 23190531 - 2⁶ = 23190467 is a prime.

It is a super-2 number, since 2×23190531² = 1075601456123922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23190539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42201 + ... + 42746.

It is an arithmetic number, because the mean of its divisors is an integer number (2378544).

Almost surely, 2^23190531 is an apocalyptic number.

23190531 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

23190531 is a deficient number, since it is larger than the sum of its proper divisors (14866173).

23190531 is a wasteful number, since it uses less digits than its factorization.

23190531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84970.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 23190531 is about 4815.6547841389. The cubic root of 23190531 is about 285.1698218421.

Adding to 23190531 its reverse (13509132), we get a palindrome (36699663).

The spelling of 23190531 in words is "twenty-three million, one hundred ninety thousand, five hundred thirty-one".