31513242769 has 12 divisors (see below), whose sum is σ = 32678723824. Its totient is φ = 30382266024.

The previous prime is 31513242763. The next prime is 31513242779. The reversal of 31513242769 is 96724231513.

It is not a de Polignac number, because 31513242769 - 2¹¹ = 31513240721 is a prime.

It is a super-2 number, since 2×31513242769² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31513242763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41542 + ... + 254464.

Almost surely, 2^31513242769 is an apocalyptic number.

It is an amenable number.

31513242769 is a deficient number, since it is larger than the sum of its proper divisors (1165481055).

31513242769 is an equidigital number, since it uses as much as digits as its factorization.

31513242769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213084 (or 213037 counting only the distinct ones).

The product of its digits is 272160, while the sum is 43.

The spelling of 31513242769 in words is "thirty-one billion, five hundred thirteen million, two hundred forty-two thousand, seven hundred sixty-nine".