31494449287 has 24 divisors (see below), whose sum is σ = 37848269952. Its totient is φ = 26103672000.

The previous prime is 31494449281. The next prime is 31494449291. The reversal of 31494449287 is 78294449413.

It is a de Polignac number, because none of the positive numbers 2^k-31494449287 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31494449281) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2078037 + ... + 2093137.

It is an arithmetic number, because the mean of its divisors is an integer number (1577011248).

Almost surely, 2^31494449287 is an apocalyptic number.

31494449287 is a deficient number, since it is larger than the sum of its proper divisors (6353820665).

31494449287 is a wasteful number, since it uses less digits than its factorization.

31494449287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16519 (or 16512 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 55.

It can be divided in two parts, 314944 and 49287, that added together give a triangular number (364231 = T₈₅₃).

The spelling of 31494449287 in words is "thirty-one billion, four hundred ninety-four million, four hundred forty-nine thousand, two hundred eighty-seven".