31310304140 has 48 divisors (see below), whose sum is σ = 68838547680. Its totient is φ = 11946547200.

The previous prime is 31310304119. The next prime is 31310304167. The reversal of 31310304140 is 4140301313.

It is a super-2 number, since 2×31310304140² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 277061 + ... + 373340.

It is an arithmetic number, because the mean of its divisors is an integer number (1434136410).

Almost surely, 2^31310304140 is an apocalyptic number.

It is an amenable number.

31310304140 is an abundant number, since it is smaller than the sum of its proper divisors (37528243540).

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

31310304140 is a wasteful number, since it uses less digits than its factorization.

31310304140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650522 (or 650520 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 31310304140 its reverse (4140301313), we get a palindrome (35450605453).

The spelling of 31310304140 in words is "thirty-one billion, three hundred ten million, three hundred four thousand, one hundred forty".