656457213 has 8 divisors (see below), whose sum is σ = 883774528. Its totient is φ = 433389024.

The previous prime is 656457203. The next prime is 656457251. The reversal of 656457213 is 312754656.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 656457213 - 2⁶ = 656457149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656457203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1061920 + ... + 1062537.

It is an arithmetic number, because the mean of its divisors is an integer number (110471816).

Almost surely, 2^656457213 is an apocalyptic number.

It is an amenable number.

656457213 is a deficient number, since it is larger than the sum of its proper divisors (227317315).

656457213 is a wasteful number, since it uses less digits than its factorization.

656457213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2124563.

The product of its digits is 151200, while the sum is 39.

The square root of 656457213 is about 25621.4209793290. The cubic root of 656457213 is about 869.0981154581.

The spelling of 656457213 in words is "six hundred fifty-six million, four hundred fifty-seven thousand, two hundred thirteen".