212531817510 has 48 divisors (see below), whose sum is σ = 554683862304. Its totient is φ = 56459650176.

The previous prime is 212531817497. The next prime is 212531817569. The reversal of 212531817510 is 15718135212.

212531817510 is a `hidden beast` number, since 2 + 12 + 53 + 1 + 81 + 7 + 510 = 666.

212531817510 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4465807 + ... + 4513146.

It is an arithmetic number, because the mean of its divisors is an integer number (11555913798).

Almost surely, 2^212531817510 is an apocalyptic number.

212531817510 is an abundant number, since it is smaller than the sum of its proper divisors (342152044794).

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

212531817510 is a wasteful number, since it uses less digits than its factorization.

212531817510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8979229 (or 8979226 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 36.

The spelling of 212531817510 in words is "two hundred twelve billion, five hundred thirty-one million, eight hundred seventeen thousand, five hundred ten".