212451868 has 12 divisors (see below), whose sum is σ = 371963592. Its totient is φ = 106176560.

The previous prime is 212451859. The next prime is 212451871. The reversal of 212451868 is 868154212.

212451868 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1630 + ... + 20677.

It is an arithmetic number, because the mean of its divisors is an integer number (30996966).

Almost surely, 2^212451868 is an apocalyptic number.

It is an amenable number.

212451868 is a deficient number, since it is larger than the sum of its proper divisors (159511724).

212451868 is a wasteful number, since it uses less digits than its factorization.

212451868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24692 (or 24690 counting only the distinct ones).

The product of its digits is 30720, while the sum is 37.

The square root of 212451868 is about 14575.7287296382. The cubic root of 212451868 is about 596.6965378690.

The spelling of 212451868 in words is "two hundred twelve million, four hundred fifty-one thousand, eight hundred sixty-eight".