23210512521 has 24 divisors (see below), whose sum is σ = 36009836640. Its totient is φ = 13259518272.

The previous prime is 23210512511. The next prime is 23210512561. The reversal of 23210512521 is 12521501232.

It is not a de Polignac number, because 23210512521 - 2¹¹ = 23210510473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23210512491 and 23210512500.

It is not an unprimeable number, because it can be changed into a prime (23210512511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 572365 + ... + 611573.

It is an arithmetic number, because the mean of its divisors is an integer number (1500409860).

Almost surely, 2^23210512521 is an apocalyptic number.

23210512521 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23210512521 is a deficient number, since it is larger than the sum of its proper divisors (12799324119).

23210512521 is a wasteful number, since it uses less digits than its factorization.

23210512521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43253 (or 43246 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The spelling of 23210512521 in words is "twenty-three billion, two hundred ten million, five hundred twelve thousand, five hundred twenty-one".