31903507480 has 64 divisors (see below), whose sum is σ = 77509101600. Its totient is φ = 11748602880.

The previous prime is 31903507423. The next prime is 31903507499. The reversal of 31903507480 is 8470530913.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116140 + ... + 278020.

Almost surely, 2^31903507480 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31903507480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38754550800).

31903507480 is an abundant number, since it is smaller than the sum of its proper divisors (45605594120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31903507480 is a wasteful number, since it uses less digits than its factorization.

31903507480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162284 (or 162280 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 31903507480 in words is "thirty-one billion, nine hundred three million, five hundred seven thousand, four hundred eighty".