213459656 has 8 divisors (see below), whose sum is σ = 400236870. Its totient is φ = 106729824.

The previous prime is 213459643. The next prime is 213459671. The reversal of 213459656 is 656954312.

It can be written as a sum of positive squares in only one way, i.e., 148011556 + 65448100 = 12166^2 + 8090^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13341221 + ... + 13341236.

Almost surely, 2^213459656 is an apocalyptic number.

It is an amenable number.

213459656 is a deficient number, since it is larger than the sum of its proper divisors (186777214).

213459656 is a wasteful number, since it uses less digits than its factorization.

213459656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26682463 (or 26682459 counting only the distinct ones).

The product of its digits is 194400, while the sum is 41.

The square root of 213459656 is about 14610.2585877184. The cubic root of 213459656 is about 597.6385477280.

The spelling of 213459656 in words is "two hundred thirteen million, four hundred fifty-nine thousand, six hundred fifty-six".