212309974 has 16 divisors (see below), whose sum is σ = 338430528. Its totient is φ = 99545472.

The previous prime is 212309947. The next prime is 212310017. The reversal of 212309974 is 479903212.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1854 + ... + 20689.

It is an arithmetic number, because the mean of its divisors is an integer number (21151908).

Almost surely, 2^212309974 is an apocalyptic number.

212309974 is a deficient number, since it is larger than the sum of its proper divisors (126120554).

212309974 is a wasteful number, since it uses less digits than its factorization.

212309974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22839.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 212309974 is about 14570.8604413054. The cubic root of 212309974 is about 596.5636661809.

The spelling of 212309974 in words is "two hundred twelve million, three hundred nine thousand, nine hundred seventy-four".