213012628 has 6 divisors (see below), whose sum is σ = 372772106. Its totient is φ = 106506312.

The previous prime is 213012619. The next prime is 213012643. The reversal of 213012628 is 826210312.

It can be written as a sum of positive squares in only one way, i.e., 142754704 + 70257924 = 11948^2 + 8382^2 .

It is a super-4 number, since 4×213012628⁴ (a number of 34 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26626575 + ... + 26626582.

Almost surely, 2^213012628 is an apocalyptic number.

It is an amenable number.

213012628 is a deficient number, since it is larger than the sum of its proper divisors (159759478).

213012628 is a wasteful number, since it uses less digits than its factorization.

213012628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53253161 (or 53253159 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 213012628 is about 14594.9521410658. The cubic root of 213012628 is about 597.2210638755.

The spelling of 213012628 in words is "two hundred thirteen million, twelve thousand, six hundred twenty-eight".