212905874 has 4 divisors (see below), whose sum is σ = 319358814. Its totient is φ = 106452936.

The previous prime is 212905843. The next prime is 212905877. The reversal of 212905874 is 478509212.

212905874 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 208600249 + 4305625 = 14443^2 + 2075^2 .

It is a super-2 number, since 2×212905874² = 90657822367407752, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (212905877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53226467 + ... + 53226470.

Almost surely, 2^212905874 is an apocalyptic number.

212905874 is a deficient number, since it is larger than the sum of its proper divisors (106452940).

212905874 is a wasteful number, since it uses less digits than its factorization.

212905874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106452939.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 212905874 is about 14591.2944593686. The cubic root of 212905874 is about 597.1212788820.

The spelling of 212905874 in words is "two hundred twelve million, nine hundred five thousand, eight hundred seventy-four".