23521022155 has 8 divisors (see below), whose sum is σ = 28227983472. Its totient is φ = 18814979808.

The previous prime is 23521022149. The next prime is 23521022167. The reversal of 23521022155 is 55122012532.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23521022155 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172117 + ... + 276886.

It is an arithmetic number, because the mean of its divisors is an integer number (3528497934).

Almost surely, 2^23521022155 is an apocalyptic number.

23521022155 is a deficient number, since it is larger than the sum of its proper divisors (4706961317).

23521022155 is a wasteful number, since it uses less digits than its factorization.

23521022155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459485.

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 23521022155 its reverse (55122012532), we get a palindrome (78643034687).

The spelling of 23521022155 in words is "twenty-three billion, five hundred twenty-one million, twenty-two thousand, one hundred fifty-five".