31372427 has 2 divisors, whose sum is σ = 31372428. Its totient is φ = 31372426.

The previous prime is 31372399. The next prime is 31372441. The reversal of 31372427 is 72427313.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31372427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31372427.

It is not a weakly prime, because it can be changed into another prime (31372027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15686213 + 15686214.

It is an arithmetic number, because the mean of its divisors is an integer number (15686214).

Almost surely, 2^31372427 is an apocalyptic number.

31372427 is a deficient number, since it is larger than the sum of its proper divisors (1).

31372427 is an equidigital number, since it uses as much as digits as its factorization.

31372427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7056, while the sum is 29.

The square root of 31372427 is about 5601.1094436727. The cubic root of 31372427 is about 315.3910554352.

The spelling of 31372427 in words is "thirty-one million, three hundred seventy-two thousand, four hundred twenty-seven".