212403051 has 24 divisors (see below), whose sum is σ = 360114144. Its totient is φ = 118091520.

The previous prime is 212403029. The next prime is 212403053. The reversal of 212403051 is 150304212.

212403051 is a `hidden beast` number, since 212 + 403 + 0 + 51 = 666.

It is not a de Polignac number, because 212403051 - 2¹⁰ = 212402027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212403053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43230 + ... + 47891.

It is an arithmetic number, because the mean of its divisors is an integer number (15004756).

Almost surely, 2^212403051 is an apocalyptic number.

212403051 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

212403051 is a deficient number, since it is larger than the sum of its proper divisors (147711093).

212403051 is a wasteful number, since it uses less digits than its factorization.

212403051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91171 (or 91168 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 212403051 is about 14574.0540344820. The cubic root of 212403051 is about 596.6508315693.

Adding to 212403051 its reverse (150304212), we get a palindrome (362707263).

The spelling of 212403051 in words is "two hundred twelve million, four hundred three thousand, fifty-one".