31499150413 has 2 divisors, whose sum is σ = 31499150414. Its totient is φ = 31499150412.

The previous prime is 31499150387. The next prime is 31499150443. The reversal of 31499150413 is 31405199413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17609820804 + 13889329609 = 132702^2 + 117853^2 .

It is a cyclic number.

It is not a de Polignac number, because 31499150413 - 2²¹ = 31497053261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31499150443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15749575206 + 15749575207.

It is an arithmetic number, because the mean of its divisors is an integer number (15749575207).

Almost surely, 2^31499150413 is an apocalyptic number.

It is an amenable number.

31499150413 is a deficient number, since it is larger than the sum of its proper divisors (1).

31499150413 is an equidigital number, since it uses as much as digits as its factorization.

31499150413 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 40.

The spelling of 31499150413 in words is "thirty-one billion, four hundred ninety-nine million, one hundred fifty thousand, four hundred thirteen".