31245204091 has 2 divisors, whose sum is σ = 31245204092. Its totient is φ = 31245204090.

The previous prime is 31245204007. The next prime is 31245204131. The reversal of 31245204091 is 19040254213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31245204091 - 2¹³ = 31245195899 is a prime.

It is not a weakly prime, because it can be changed into another prime (31245204691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15622602045 + 15622602046.

It is an arithmetic number, because the mean of its divisors is an integer number (15622602046).

Almost surely, 2^31245204091 is an apocalyptic number.

31245204091 is a deficient number, since it is larger than the sum of its proper divisors (1).

31245204091 is an equidigital number, since it uses as much as digits as its factorization.

31245204091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 31245204091 in words is "thirty-one billion, two hundred forty-five million, two hundred four thousand, ninety-one".