31731594049 has 2 divisors, whose sum is σ = 31731594050. Its totient is φ = 31731594048.

The previous prime is 31731594031. The next prime is 31731594061. The reversal of 31731594049 is 94049513713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28594810000 + 3136784049 = 169100^2 + 56007^2 .

It is a cyclic number.

It is not a de Polignac number, because 31731594049 - 2¹³ = 31731585857 is a prime.

It is not a weakly prime, because it can be changed into another prime (31731594019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15865797024 + 15865797025.

It is an arithmetic number, because the mean of its divisors is an integer number (15865797025).

Almost surely, 2^31731594049 is an apocalyptic number.

It is an amenable number.

31731594049 is a deficient number, since it is larger than the sum of its proper divisors (1).

31731594049 is an equidigital number, since it uses as much as digits as its factorization.

31731594049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 408240, while the sum is 46.

The spelling of 31731594049 in words is "thirty-one billion, seven hundred thirty-one million, five hundred ninety-four thousand, forty-nine".