31301057 has 2 divisors, whose sum is σ = 31301058. Its totient is φ = 31301056.

The previous prime is 31301021. The next prime is 31301059. The reversal of 31301057 is 75010313.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31013761 + 287296 = 5569^2 + 536^2 .

It is a cyclic number.

It is not a de Polignac number, because 31301057 - 2¹² = 31296961 is a prime.

Together with 31301059, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31301059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15650528 + 15650529.

It is an arithmetic number, because the mean of its divisors is an integer number (15650529).

Almost surely, 2^31301057 is an apocalyptic number.

It is an amenable number.

31301057 is a deficient number, since it is larger than the sum of its proper divisors (1).

31301057 is an equidigital number, since it uses as much as digits as its factorization.

31301057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 315, while the sum is 20.

The square root of 31301057 is about 5594.7347568942. The cubic root of 31301057 is about 315.1517099067.

The spelling of 31301057 in words is "thirty-one million, three hundred one thousand, fifty-seven".