31742867519 has 4 divisors (see below), whose sum is σ = 34628582760. Its totient is φ = 28857152280.

The previous prime is 31742867461. The next prime is 31742867549. The reversal of 31742867519 is 91576824713.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 31742867519 - 2⁸ = 31742867263 is a prime.

It is a super-2 number, since 2×31742867519² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31742867549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1442857604 + ... + 1442857625.

It is an arithmetic number, because the mean of its divisors is an integer number (8657145690).

Almost surely, 2^31742867519 is an apocalyptic number.

31742867519 is a deficient number, since it is larger than the sum of its proper divisors (2885715241).

31742867519 is a wasteful number, since it uses less digits than its factorization.

31742867519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2885715240.

The product of its digits is 2540160, while the sum is 53.

The spelling of 31742867519 in words is "thirty-one billion, seven hundred forty-two million, eight hundred sixty-seven thousand, five hundred nineteen".