212423751 has 12 divisors (see below), whose sum is σ = 307708128. Its totient is φ = 141212544.

The previous prime is 212423737. The next prime is 212423773. The reversal of 212423751 is 157324212.

It is not a de Polignac number, because 212423751 - 2²⁵ = 178869319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212423051) 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 11 ways as a sum of consecutive naturals, for example, 30255 + ... + 36608.

It is an arithmetic number, because the mean of its divisors is an integer number (25642344).

Almost surely, 2^212423751 is an apocalyptic number.

212423751 is a deficient number, since it is larger than the sum of its proper divisors (95284377).

212423751 is a wasteful number, since it uses less digits than its factorization.

212423751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67222 (or 67219 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 212423751 is about 14574.7641833410. The cubic root of 212423751 is about 596.6702133860.

Adding to 212423751 its reverse (157324212), we get a palindrome (369747963).

The spelling of 212423751 in words is "two hundred twelve million, four hundred twenty-three thousand, seven hundred fifty-one".