212015566520 has 32 divisors (see below), whose sum is σ = 477891511200. Its totient is φ = 84653962368.

The previous prime is 212015566519. The next prime is 212015566559. The reversal of 212015566520 is 25665510212.

It is a congruent 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, 4735700 + ... + 4780259.

It is an arithmetic number, because the mean of its divisors is an integer number (14934109725).

Almost surely, 2^212015566520 is an apocalyptic number.

212015566520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212015566520 is an abundant number, since it is smaller than the sum of its proper divisors (265875944680).

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

212015566520 is a wasteful number, since it uses less digits than its factorization.

212015566520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9516527 (or 9516523 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

The spelling of 212015566520 in words is "two hundred twelve billion, fifteen million, five hundred sixty-six thousand, five hundred twenty".