31371125783 has 2 divisors, whose sum is σ = 31371125784. Its totient is φ = 31371125782.

The previous prime is 31371125759. The next prime is 31371125789. The reversal of 31371125783 is 38752117313.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31371125783 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31371125783.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31371125789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15685562891 + 15685562892.

It is an arithmetic number, because the mean of its divisors is an integer number (15685562892).

Almost surely, 2^31371125783 is an apocalyptic number.

31371125783 is a deficient number, since it is larger than the sum of its proper divisors (1).

31371125783 is an equidigital number, since it uses as much as digits as its factorization.

31371125783 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 41.

The spelling of 31371125783 in words is "thirty-one billion, three hundred seventy-one million, one hundred twenty-five thousand, seven hundred eighty-three".