31040031402 has 24 divisors (see below), whose sum is σ = 67266457284. Its totient is φ = 10344668544.

The previous prime is 31040031311. The next prime is 31040031403. The reversal of 31040031402 is 20413004013.

31040031402 is a `hidden beast` number, since 310 + 40 + 0 + 314 + 0 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 24338808081 + 6701223321 = 156009^2 + 81861^2 .

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

It is not an unprimeable number, because it can be changed into a prime (31040031403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70573 + ... + 258960.

Almost surely, 2^31040031402 is an apocalyptic number.

31040031402 is an abundant number, since it is smaller than the sum of its proper divisors (36226425882).

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

31040031402 is a wasteful number, since it uses less digits than its factorization.

31040031402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334774 (or 334771 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 31040031402 its reverse (20413004013), we get a palindrome (51453035415).

The spelling of 31040031402 in words is "thirty-one billion, forty million, thirty-one thousand, four hundred two".