31150057 has 2 divisors, whose sum is σ = 31150058. Its totient is φ = 31150056.

The previous prime is 31150051. The next prime is 31150087. The reversal of 31150057 is 75005113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22005481 + 9144576 = 4691^2 + 3024^2 .

It is a cyclic number.

It is not a de Polignac number, because 31150057 - 2⁷ = 31149929 is a prime.

It is a super-2 number, since 2×31150057² = 1940652102206498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (31150051) 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 as a sum of consecutive naturals, namely, 15575028 + 15575029.

It is an arithmetic number, because the mean of its divisors is an integer number (15575029).

Almost surely, 2^31150057 is an apocalyptic number.

It is an amenable number.

31150057 is a deficient number, since it is larger than the sum of its proper divisors (1).

31150057 is an equidigital number, since it uses as much as digits as its factorization.

31150057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 525, while the sum is 22.

The square root of 31150057 is about 5581.2236113598. The cubic root of 31150057 is about 314.6441164286.

The spelling of 31150057 in words is "thirty-one million, one hundred fifty thousand, fifty-seven".