212564051 has 4 divisors (see below), whose sum is σ = 242930352. Its totient is φ = 182197752.

The previous prime is 212564041. The next prime is 212564063. The reversal of 212564051 is 150465212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212564051 - 2⁶ = 212563987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212564051.

It is not an unprimeable number, because it can be changed into a prime (212564041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15183140 + ... + 15183153.

It is an arithmetic number, because the mean of its divisors is an integer number (60732588).

Almost surely, 2^212564051 is an apocalyptic number.

212564051 is a deficient number, since it is larger than the sum of its proper divisors (30366301).

212564051 is an equidigital number, since it uses as much as digits as its factorization.

212564051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30366300.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 212564051 is about 14579.5765027658. The cubic root of 212564051 is about 596.8015458560.

The spelling of 212564051 in words is "two hundred twelve million, five hundred sixty-four thousand, fifty-one".