631119155 has 4 divisors (see below), whose sum is σ = 757342992. Its totient is φ = 504895320.

The previous prime is 631119121. The next prime is 631119157. The reversal of 631119155 is 551911136.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 631119155 - 2¹² = 631115059 is a prime.

It is a super-2 number, since 2×631119155² = 796622775615828050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (631119157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63111911 + ... + 63111920.

It is an arithmetic number, because the mean of its divisors is an integer number (189335748).

Almost surely, 2^631119155 is an apocalyptic number.

631119155 is a deficient number, since it is larger than the sum of its proper divisors (126223837).

631119155 is a wasteful number, since it uses less digits than its factorization.

631119155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126223836.

The product of its digits is 4050, while the sum is 32.

The square root of 631119155 is about 25122.0850050309. The cubic root of 631119155 is about 857.7692117122.

The spelling of 631119155 in words is "six hundred thirty-one million, one hundred nineteen thousand, one hundred fifty-five".