23353165521 has 48 divisors (see below), whose sum is σ = 39164636160. Its totient is φ = 13133145600.

The previous prime is 23353165403. The next prime is 23353165531. The reversal of 23353165521 is 12556135332.

23353165521 is a `hidden beast` number, since 2 + 335 + 316 + 5 + 5 + 2 + 1 = 666.

It is not a de Polignac number, because 23353165521 - 2⁷ = 23353165393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23353165531) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2197621 + ... + 2208221.

It is an arithmetic number, because the mean of its divisors is an integer number (815929920).

Almost surely, 2^23353165521 is an apocalyptic number.

23353165521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23353165521 is a deficient number, since it is larger than the sum of its proper divisors (15811470639).

23353165521 is a wasteful number, since it uses less digits than its factorization.

23353165521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11166 (or 11163 counting only the distinct ones).

The product of its digits is 81000, while the sum is 36.

The spelling of 23353165521 in words is "twenty-three billion, three hundred fifty-three million, one hundred sixty-five thousand, five hundred twenty-one".