213166832520 has 64 divisors (see below), whose sum is σ = 640682763840. Its totient is φ = 56739398400.

The previous prime is 213166832509. The next prime is 213166832521. The reversal of 213166832520 is 25238661312.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (213166832521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1576846 + ... + 1706685.

It is an arithmetic number, because the mean of its divisors is an integer number (10010668185).

Almost surely, 2^213166832520 is an apocalyptic number.

213166832520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213166832520 is an abundant number, since it is smaller than the sum of its proper divisors (427515931320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213166832520 is a wasteful number, since it uses less digits than its factorization.

213166832520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3284086 (or 3284082 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 213166832520 in words is "two hundred thirteen billion, one hundred sixty-six million, eight hundred thirty-two thousand, five hundred twenty".