30996631 has 2 divisors, whose sum is σ = 30996632. Its totient is φ = 30996630.

The previous prime is 30996629. The next prime is 30996643. The reversal of 30996631 is 13669903.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30996631 - 2¹ = 30996629 is a prime.

It is a super-2 number, since 2×30996631² = 1921582266700322, which contains 22 as substring.

Together with 30996629, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30996611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15498315 + 15498316.

It is an arithmetic number, because the mean of its divisors is an integer number (15498316).

Almost surely, 2^30996631 is an apocalyptic number.

30996631 is a deficient number, since it is larger than the sum of its proper divisors (1).

30996631 is an equidigital number, since it uses as much as digits as its factorization.

30996631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 30996631 is about 5567.4618094784. The cubic root of 30996631 is about 314.1266849221.

It can be divided in two parts, 3099 and 6631, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 30996631 in words is "thirty million, nine hundred ninety-six thousand, six hundred thirty-one".