31948206540 has 48 divisors (see below), whose sum is σ = 90714919680. Its totient is φ = 8399527360.

The previous prime is 31948206503. The next prime is 31948206547. The reversal of 31948206540 is 4560284913.

It is a super-2 number, since 2×31948206540² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31948206492 and 31948206501.

It is not an unprimeable number, because it can be changed into a prime (31948206547) by changing a digit.

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, 3745530 + ... + 3754049.

It is an arithmetic number, because the mean of its divisors is an integer number (1889894160).

Almost surely, 2^31948206540 is an apocalyptic number.

31948206540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31948206540 is an abundant number, since it is smaller than the sum of its proper divisors (58766713140).

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

31948206540 is a wasteful number, since it uses less digits than its factorization.

31948206540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7499662 (or 7499660 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 31948206540 in words is "thirty-one billion, nine hundred forty-eight million, two hundred six thousand, five hundred forty".