655631501 has 16 divisors (see below), whose sum is σ = 758462208. Its totient is φ = 555120000.

The previous prime is 655631467. The next prime is 655631521. The reversal of 655631501 is 105136556.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-655631501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655631521) 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, 424136 + ... + 425678.

It is an arithmetic number, because the mean of its divisors is an integer number (47403888).

Almost surely, 2^655631501 is an apocalyptic number.

It is an amenable number.

655631501 is a deficient number, since it is larger than the sum of its proper divisors (102830707).

655631501 is a wasteful number, since it uses less digits than its factorization.

655631501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2252.

The product of its (nonzero) digits is 13500, while the sum is 32.

The square root of 655631501 is about 25605.3022048169. The cubic root of 655631501 is about 868.7335698219.

The spelling of 655631501 in words is "six hundred fifty-five million, six hundred thirty-one thousand, five hundred one".