631056155 has 8 divisors (see below), whose sum is σ = 758851200. Its totient is φ = 503789056.

The previous prime is 631056149. The next prime is 631056193. The reversal of 631056155 is 551650136.

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

It is a cyclic number.

It is not a de Polignac number, because 631056155 - 2⁶ = 631056091 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129350 + ... + 134139.

It is an arithmetic number, because the mean of its divisors is an integer number (94856400).

Almost surely, 2^631056155 is an apocalyptic number.

631056155 is a deficient number, since it is larger than the sum of its proper divisors (127795045).

631056155 is a wasteful number, since it uses less digits than its factorization.

631056155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263973.

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

The square root of 631056155 is about 25120.8310969203. The cubic root of 631056155 is about 857.7406691578.

The spelling of 631056155 in words is "six hundred thirty-one million, fifty-six thousand, one hundred fifty-five".