212565051 has 6 divisors (see below), whose sum is σ = 307038420. Its totient is φ = 141710028.

The previous prime is 212565043. The next prime is 212565061. The reversal of 212565051 is 150565212.

212565051 is a `hidden beast` number, since 2 + 1 + 2 + 5 + 650 + 5 + 1 = 666.

It is not a de Polignac number, because 212565051 - 2³ = 212565043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212565061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11809161 + ... + 11809178.

It is an arithmetic number, because the mean of its divisors is an integer number (51173070).

Almost surely, 2^212565051 is an apocalyptic number.

212565051 is a deficient number, since it is larger than the sum of its proper divisors (94473369).

212565051 is a wasteful number, since it uses less digits than its factorization.

212565051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23618345 (or 23618342 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 212565051 is about 14579.6107972744. The cubic root of 212565051 is about 596.8024817317.

It can be divided in two parts, 2125 and 65051, that added together give a palindrome (67176).

The spelling of 212565051 in words is "two hundred twelve million, five hundred sixty-five thousand, fifty-one".