23021131 has 16 divisors (see below), whose sum is σ = 27518400. Its totient is φ = 19239360.

The previous prime is 23021101. The next prime is 23021147. The reversal of 23021131 is 13112032.

It is not a de Polignac number, because 23021131 - 2⁹ = 23020619 is a prime.

It is a super-2 number, since 2×23021131² = 1059944945038322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23021101) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13245 + ... + 14881.

It is an arithmetic number, because the mean of its divisors is an integer number (1719900).

Almost surely, 2^23021131 is an apocalyptic number.

23021131 is a deficient number, since it is larger than the sum of its proper divisors (4497269).

23021131 is an equidigital number, since it uses as much as digits as its factorization.

23021131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699 (or 1685 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 23021131 is about 4798.0340765776. The cubic root of 23021131 is about 284.4737637229.

Adding to 23021131 its reverse (13112032), we get a palindrome (36133163).

Subtracting from 23021131 its reverse (13112032), we obtain a palindrome (9909099).

The spelling of 23021131 in words is "twenty-three million, twenty-one thousand, one hundred thirty-one".