23231502221 has 4 divisors (see below), whose sum is σ = 23359853244. Its totient is φ = 23103151200.

The previous prime is 23231502209. The next prime is 23231502253. The reversal of 23231502221 is 12220513232.

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

It can be written as a sum of positive squares in 2 ways, for example, as 92833225 + 23138668996 = 9635^2 + 152114^2 .

It is a cyclic number.

It is not a de Polignac number, because 23231502221 - 2¹⁰ = 23231501197 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 (23231502121) 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, 64175240 + ... + 64175601.

It is an arithmetic number, because the mean of its divisors is an integer number (5839963311).

Almost surely, 2^23231502221 is an apocalyptic number.

It is an amenable number.

23231502221 is a deficient number, since it is larger than the sum of its proper divisors (128351023).

23231502221 is a wasteful number, since it uses less digits than its factorization.

23231502221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128351022.

The product of its (nonzero) digits is 1440, while the sum is 23.

The spelling of 23231502221 in words is "twenty-three billion, two hundred thirty-one million, five hundred two thousand, two hundred twenty-one".