31403413240 has 32 divisors (see below), whose sum is σ = 71552088000. Its totient is φ = 12402359424.

The previous prime is 31403413159. The next prime is 31403413247. The reversal of 31403413240 is 4231430413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31403413247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4965735 + ... + 4972054.

It is an arithmetic number, because the mean of its divisors is an integer number (2236002750).

Almost surely, 2^31403413240 is an apocalyptic number.

It is an amenable number.

31403413240 is an abundant number, since it is smaller than the sum of its proper divisors (40148674760).

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

31403413240 is a wasteful number, since it uses less digits than its factorization.

31403413240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9937879 (or 9937875 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 31403413240 its reverse (4231430413), we get a palindrome (35634843653).

The spelling of 31403413240 in words is "thirty-one billion, four hundred three million, four hundred thirteen thousand, two hundred forty".