631161055 has 64 divisors (see below), whose sum is σ = 934778880. Its totient is φ = 399826944.

The previous prime is 631161049. The next prime is 631161071. The reversal of 631161055 is 550161136.

It is a cyclic number.

It is not a de Polignac number, because 631161055 - 2⁷ = 631160927 is a prime.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 4606947 + ... + 4607083.

It is an arithmetic number, because the mean of its divisors is an integer number (14605920).

Almost surely, 2^631161055 is an apocalyptic number.

631161055 is a deficient number, since it is larger than the sum of its proper divisors (303617825).

631161055 is a wasteful number, since it uses less digits than its factorization.

631161055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 631161055 is about 25122.9189187881. The cubic root of 631161055 is about 857.7881937245.

The spelling of 631161055 in words is "six hundred thirty-one million, one hundred sixty-one thousand, fifty-five".