31302013320 has 96 divisors (see below), whose sum is σ = 104481088920. Its totient is φ = 8121600000.

The previous prime is 31302013297. The next prime is 31302013331. The reversal of 31302013320 is 2331020313.

31302013320 is a `hidden beast` number, since 3 + 130 + 201 + 332 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 31280167044 + 21846276 = 176862^2 + 4674^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 31302013293 and 31302013302.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1161681 + ... + 1188320.

Almost surely, 2^31302013320 is an apocalyptic number.

31302013320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31302013320 is an abundant number, since it is smaller than the sum of its proper divisors (73179075600).

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

31302013320 is a wasteful number, since it uses less digits than its factorization.

31302013320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2350055 (or 2350048 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 31302013320 its reverse (2331020313), we get a palindrome (33633033633).

The spelling of 31302013320 in words is "thirty-one billion, three hundred two million, thirteen thousand, three hundred twenty".