31481880531 has 8 divisors (see below), whose sum is σ = 41983978944. Its totient is φ = 20983851240.

The previous prime is 31481880449. The next prime is 31481880541. The reversal of 31481880531 is 13508818413.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31481880531 - 2²⁹ = 30945009619 is a prime.

It is a super-2 number, since 2×31481880531² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31481880541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 999181 + ... + 1030206.

It is an arithmetic number, because the mean of its divisors is an integer number (5247997368).

Almost surely, 2^31481880531 is an apocalyptic number.

31481880531 is a deficient number, since it is larger than the sum of its proper divisors (10502098413).

31481880531 is a wasteful number, since it uses less digits than its factorization.

31481880531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034561.

The product of its (nonzero) digits is 92160, while the sum is 42.

The spelling of 31481880531 in words is "thirty-one billion, four hundred eighty-one million, eight hundred eighty thousand, five hundred thirty-one".