630755031 has 4 divisors (see below), whose sum is σ = 841006712. Its totient is φ = 420503352.

The previous prime is 630755011. The next prime is 630755053. The reversal of 630755031 is 130557036.

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

It is a de Polignac number, because none of the positive numbers 2^k-630755031 is a prime.

It is a super-2 number, since 2×630755031² = 795703818263621922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 630755031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630755011) 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, 105125836 + ... + 105125841.

It is an arithmetic number, because the mean of its divisors is an integer number (210251678).

Almost surely, 2^630755031 is an apocalyptic number.

630755031 is a deficient number, since it is larger than the sum of its proper divisors (210251681).

630755031 is a wasteful number, since it uses less digits than its factorization.

630755031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210251680.

The product of its (nonzero) digits is 9450, while the sum is 30.

The square root of 630755031 is about 25114.8368698664. The cubic root of 630755031 is about 857.6042167503.

The spelling of 630755031 in words is "six hundred thirty million, seven hundred fifty-five thousand, thirty-one".