656312135 has 4 divisors (see below), whose sum is σ = 787574568. Its totient is φ = 525049704.

The previous prime is 656312131. The next prime is 656312147. The reversal of 656312135 is 531213656.

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

It is a cyclic number.

It is not a de Polignac number, because 656312135 - 2² = 656312131 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 (656312131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65631209 + ... + 65631218.

It is an arithmetic number, because the mean of its divisors is an integer number (196893642).

Almost surely, 2^656312135 is an apocalyptic number.

656312135 is a deficient number, since it is larger than the sum of its proper divisors (131262433).

656312135 is a wasteful number, since it uses less digits than its factorization.

656312135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131262432.

The product of its digits is 16200, while the sum is 32.

The square root of 656312135 is about 25618.5896372146. The cubic root of 656312135 is about 869.0340867580.

The spelling of 656312135 in words is "six hundred fifty-six million, three hundred twelve thousand, one hundred thirty-five".