656051631 has 8 divisors (see below), whose sum is σ = 876940464. Its totient is φ = 436265280.

The previous prime is 656051623. The next prime is 656051633. The reversal of 656051631 is 136150656.

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

It is not a de Polignac number, because 656051631 - 2³ = 656051623 is a prime.

It is a super-2 number, since 2×656051631² = 860807485075520322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 656051592 and 656051601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (656051633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274230 + ... + 276611.

It is an arithmetic number, because the mean of its divisors is an integer number (109617558).

Almost surely, 2^656051631 is an apocalyptic number.

656051631 is a deficient number, since it is larger than the sum of its proper divisors (220888833).

656051631 is a wasteful number, since it uses less digits than its factorization.

656051631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551241.

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 656051631 is about 25613.5048558373. The cubic root of 656051631 is about 868.9190922796.

The spelling of 656051631 in words is "six hundred fifty-six million, fifty-one thousand, six hundred thirty-one".