656611131 has 16 divisors (see below), whose sum is σ = 956688768. Its totient is φ = 397272000.

The previous prime is 656611051. The next prime is 656611141. The reversal of 656611131 is 131116656.

It is not a de Polignac number, because 656611131 - 2¹³ = 656602939 is a prime.

It is a super-2 number, since 2×656611131² = 862276354706198322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (656611141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3280 + ... + 36386.

It is an arithmetic number, because the mean of its divisors is an integer number (59793048).

Almost surely, 2^656611131 is an apocalyptic number.

656611131 is a deficient number, since it is larger than the sum of its proper divisors (300077637).

656611131 is a wasteful number, since it uses less digits than its factorization.

656611131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33722.

The product of its digits is 3240, while the sum is 30.

The square root of 656611131 is about 25624.4245008546. The cubic root of 656611131 is about 869.1660352898.

Adding to 656611131 its reverse (131116656), we get a palindrome (787727787).

The spelling of 656611131 in words is "six hundred fifty-six million, six hundred eleven thousand, one hundred thirty-one".