212521044 has 24 divisors (see below), whose sum is σ = 509285728. Its totient is φ = 68925600.

The previous prime is 212521037. The next prime is 212521051. The reversal of 212521044 is 440125212.

212521044 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (212521037) and next prime (212521051).

It is a self number, because there is not a number n which added to its sum of digits gives 212521044.

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, 238882 + ... + 239769.

Almost surely, 2^212521044 is an apocalyptic number.

It is an amenable number.

212521044 is an abundant number, since it is smaller than the sum of its proper divisors (296764684).

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

212521044 is a wasteful number, since it uses less digits than its factorization.

212521044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478695 (or 478693 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 212521044 is about 14578.1015224891. The cubic root of 212521044 is about 596.7612938705.

Adding to 212521044 its reverse (440125212), we get a palindrome (652646256).

The spelling of 212521044 in words is "two hundred twelve million, five hundred twenty-one thousand, forty-four".