630042531 has 8 divisors (see below), whose sum is σ = 860546064. Its totient is φ = 409783680.

The previous prime is 630042509. The next prime is 630042541. The reversal of 630042531 is 135240036.

It is a happy number.

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

It is not a de Polignac number, because 630042531 - 2⁵ = 630042499 is a prime.

It is a super-2 number, since 2×630042531² = 793907181737771922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (630042541) 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 7 ways as a sum of consecutive naturals, for example, 2561026 + ... + 2561271.

It is an arithmetic number, because the mean of its divisors is an integer number (107568258).

Almost surely, 2^630042531 is an apocalyptic number.

630042531 is a deficient number, since it is larger than the sum of its proper divisors (230503533).

630042531 is a wasteful number, since it uses less digits than its factorization.

630042531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5122341.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 630042531 is about 25100.6480195233. The cubic root of 630042531 is about 857.2811789112.

Adding to 630042531 its reverse (135240036), we get a palindrome (765282567).

The spelling of 630042531 in words is "six hundred thirty million, forty-two thousand, five hundred thirty-one".