212451156 has 18 divisors (see below), whose sum is σ = 537029402. Its totient is φ = 70817040.

The previous prime is 212451143. The next prime is 212451167. The reversal of 212451156 is 651154212.

It can be written as a sum of positive squares in only one way, i.e., 156650256 + 55800900 = 12516^2 + 7470^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2950675 + ... + 2950746.

Almost surely, 2^212451156 is an apocalyptic number.

It is an amenable number.

212451156 is an abundant number, since it is smaller than the sum of its proper divisors (324578246).

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

212451156 is a wasteful number, since it uses less digits than its factorization.

212451156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5901431 (or 5901426 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 212451156 is about 14575.7043054530. The cubic root of 212451156 is about 596.6958712892.

The spelling of 212451156 in words is "two hundred twelve million, four hundred fifty-one thousand, one hundred fifty-six".