31057801 has 2 divisors, whose sum is σ = 31057802. Its totient is φ = 31057800.

The previous prime is 31057771. The next prime is 31057813. The reversal of 31057801 is 10875013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29986576 + 1071225 = 5476^2 + 1035^2 .

It is an emirp because it is prime and its reverse (10875013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31057801 - 2⁵ = 31057769 is a prime.

It is not a weakly prime, because it can be changed into another prime (31057891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15528900 + 15528901.

It is an arithmetic number, because the mean of its divisors is an integer number (15528901).

Almost surely, 2^31057801 is an apocalyptic number.

It is an amenable number.

31057801 is a deficient number, since it is larger than the sum of its proper divisors (1).

31057801 is an equidigital number, since it uses as much as digits as its factorization.

31057801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 31057801 is about 5572.9526285444. The cubic root of 31057801 is about 314.3331858930. Note that the first 3 decimals are identical.

The spelling of 31057801 in words is "thirty-one million, fifty-seven thousand, eight hundred one".