30961331 has 2 divisors, whose sum is σ = 30961332. Its totient is φ = 30961330.

The previous prime is 30961327. The next prime is 30961339. The reversal of 30961331 is 13316903.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 30961331 - 2² = 30961327 is a prime.

It is a super-2 number, since 2×30961331² = 1917208034583122, 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 30961331.

It is not a weakly prime, because it can be changed into another prime (30961339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15480665 + 15480666.

It is an arithmetic number, because the mean of its divisors is an integer number (15480666).

Almost surely, 2^30961331 is an apocalyptic number.

30961331 is a deficient number, since it is larger than the sum of its proper divisors (1).

30961331 is an equidigital number, since it uses as much as digits as its factorization.

30961331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 26.

The square root of 30961331 is about 5564.2907005296. The cubic root of 30961331 is about 314.0073936350.

The spelling of 30961331 in words is "thirty million, nine hundred sixty-one thousand, three hundred thirty-one".