31150961 has 2 divisors, whose sum is σ = 31150962. Its totient is φ = 31150960.

The previous prime is 31150957. The next prime is 31150967. The reversal of 31150961 is 16905113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17901361 + 13249600 = 4231^2 + 3640^2 .

It is a cyclic number.

It is not a de Polignac number, because 31150961 - 2² = 31150957 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31150961.

It is not a weakly prime, because it can be changed into another prime (31150967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15575480 + 15575481.

It is an arithmetic number, because the mean of its divisors is an integer number (15575481).

Almost surely, 2^31150961 is an apocalyptic number.

It is an amenable number.

31150961 is a deficient number, since it is larger than the sum of its proper divisors (1).

31150961 is an equidigital number, since it uses as much as digits as its factorization.

31150961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 26.

The square root of 31150961 is about 5581.3045965975. The cubic root of 31150961 is about 314.6471601419.

The spelling of 31150961 in words is "thirty-one million, one hundred fifty thousand, nine hundred sixty-one".