212539990 has 16 divisors (see below), whose sum is σ = 412000848. Its totient is φ = 78476256.

The previous prime is 212539931. The next prime is 212539993. The reversal of 212539990 is 99935212.

212539990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212539993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 817332 + ... + 817591.

It is an arithmetic number, because the mean of its divisors is an integer number (25750053).

Almost surely, 2^212539990 is an apocalyptic number.

212539990 is a deficient number, since it is larger than the sum of its proper divisors (199460858).

212539990 is a wasteful number, since it uses less digits than its factorization.

212539990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634943.

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 212539990 is about 14578.7513182714. The cubic root of 212539990 is about 596.7790268650.

The spelling of 212539990 in words is "two hundred twelve million, five hundred thirty-nine thousand, nine hundred ninety".