212539900 has 36 divisors (see below), whose sum is σ = 472469760. Its totient is φ = 82940800.

The previous prime is 212539883. The next prime is 212539903. The reversal of 212539900 is 9935212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212539903) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21820 + ... + 30019.

It is an arithmetic number, because the mean of its divisors is an integer number (13124160).

Almost surely, 2^212539900 is an apocalyptic number.

212539900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212539900 is an abundant number, since it is smaller than the sum of its proper divisors (259929860).

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

212539900 is a wasteful number, since it uses less digits than its factorization.

212539900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51894 (or 51887 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 212539900 is about 14578.7482315870. The cubic root of 212539900 is about 596.7789426297.

It can be divided in two parts, 2125 and 39900, that added together give a square (42025 = 205²).

The spelling of 212539900 in words is "two hundred twelve million, five hundred thirty-nine thousand, nine hundred".