31303652040 has 160 divisors (see below), whose sum is σ = 106547760000. Its totient is φ = 8241906816.

The previous prime is 31303651943. The next prime is 31303652041. The reversal of 31303652040 is 4025630313.

It is a happy number.

31303652040 is a `hidden beast` number, since 3 + 1 + 3 + 0 + 3 + 652 + 0 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 31303651995 and 31303652013.

It is not an unprimeable number, because it can be changed into a prime (31303652041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 194811 + ... + 317109.

It is an arithmetic number, because the mean of its divisors is an integer number (665923500).

Almost surely, 2^31303652040 is an apocalyptic number.

31303652040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31303652040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53273880000).

31303652040 is an abundant number, since it is smaller than the sum of its proper divisors (75244107960).

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

31303652040 is a wasteful number, since it uses less digits than its factorization.

31303652040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122401 (or 122388 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The spelling of 31303652040 in words is "thirty-one billion, three hundred three million, six hundred fifty-two thousand, forty".