23521521033 has 24 divisors (see below), whose sum is σ = 35237819136. Its totient is φ = 15103216800.

The previous prime is 23521521013. The next prime is 23521521043. The reversal of 23521521033 is 33012512532.

It is a happy number.

23521521033 is a `hidden beast` number, since 235 + 215 + 210 + 3 + 3 = 666.

It is not a de Polignac number, because 23521521033 - 2⁶ = 23521520969 is a prime.

It is a super-2 number, since 2×23521521033² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23521520988 and 23521521006.

It is not an unprimeable number, because it can be changed into a prime (23521521013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140910 + ... + 258647.

It is an arithmetic number, because the mean of its divisors is an integer number (1468242464).

Almost surely, 2^23521521033 is an apocalyptic number.

It is an amenable number.

23521521033 is a deficient number, since it is larger than the sum of its proper divisors (11716298103).

23521521033 is a wasteful number, since it uses less digits than its factorization.

23521521033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399805 (or 399802 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

It can be divided in two parts, 2352 and 1521033, that added together give a triangular number (1523385 = T₁₇₄₅).

The spelling of 23521521033 in words is "twenty-three billion, five hundred twenty-one million, five hundred twenty-one thousand, thirty-three".