31432057 has 2 divisors, whose sum is σ = 31432058. Its totient is φ = 31432056.

The previous prime is 31432033. The next prime is 31432069. The reversal of 31432057 is 75023413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31181056 + 251001 = 5584^2 + 501^2 .

It is an emirp because it is prime and its reverse (75023413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31432057 - 2¹⁹ = 30907769 is a prime.

It is not a weakly prime, because it can be changed into another prime (31436057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15716028 + 15716029.

It is an arithmetic number, because the mean of its divisors is an integer number (15716029).

Almost surely, 2^31432057 is an apocalyptic number.

It is an amenable number.

31432057 is a deficient number, since it is larger than the sum of its proper divisors (1).

31432057 is an equidigital number, since it uses as much as digits as its factorization.

31432057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 31432057 is about 5606.4299692407. The cubic root of 31432057 is about 315.5907516608.

The spelling of 31432057 in words is "thirty-one million, four hundred thirty-two thousand, fifty-seven".