23152643221 has 4 divisors (see below), whose sum is σ = 23254637472. Its totient is φ = 23050648972.

The previous prime is 23152643197. The next prime is 23152643233. The reversal of 23152643221 is 12234625132.

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 23152643221 - 2³¹ = 21005159573 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 (23152143221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50996785 + ... + 50997238.

It is an arithmetic number, because the mean of its divisors is an integer number (5813659368).

Almost surely, 2^23152643221 is an apocalyptic number.

It is an amenable number.

23152643221 is a deficient number, since it is larger than the sum of its proper divisors (101994251).

23152643221 is a wasteful number, since it uses less digits than its factorization.

23152643221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101994250.

The product of its digits is 17280, while the sum is 31.

The spelling of 23152643221 in words is "twenty-three billion, one hundred fifty-two million, six hundred forty-three thousand, two hundred twenty-one".