630156131 has 4 divisors (see below), whose sum is σ = 687443064. Its totient is φ = 572869200.

The previous prime is 630156097. The next prime is 630156143. The reversal of 630156131 is 131651036.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-630156131 is a prime.

It is a super-2 number, since 2×630156131² = 794193498873778322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 630156131.

It is not an unprimeable number, because it can be changed into a prime (630156181) 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 3 ways as a sum of consecutive naturals, for example, 28643450 + ... + 28643471.

It is an arithmetic number, because the mean of its divisors is an integer number (171860766).

Almost surely, 2^630156131 is an apocalyptic number.

630156131 is a deficient number, since it is larger than the sum of its proper divisors (57286933).

630156131 is a wasteful number, since it uses less digits than its factorization.

630156131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57286932.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 630156131 is about 25102.9108073148. The cubic root of 630156131 is about 857.3326999248.

The spelling of 630156131 in words is "six hundred thirty million, one hundred fifty-six thousand, one hundred thirty-one".