31314420040 has 16 divisors (see below), whose sum is σ = 70457445180. Its totient is φ = 12525768000.

The previous prime is 31314420037. The next prime is 31314420047. The reversal of 31314420040 is 4002441313.

It can be written as a sum of positive squares in 2 ways, for example, as 31003462084 + 310957956 = 176078^2 + 17634^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31314419993 and 31314420020.

It is not an unprimeable number, because it can be changed into a prime (31314420047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391430211 + ... + 391430290.

Almost surely, 2^31314420040 is an apocalyptic number.

It is an amenable number.

31314420040 is an abundant number, since it is smaller than the sum of its proper divisors (39143025140).

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

31314420040 is a wasteful number, since it uses less digits than its factorization.

31314420040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782860512 (or 782860508 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 31314420040 its reverse (4002441313), we get a palindrome (35316861353).

The spelling of 31314420040 in words is "thirty-one billion, three hundred fourteen million, four hundred twenty thousand, forty".