31133401240 has 32 divisors (see below), whose sum is σ = 72465678000. Its totient is φ = 12023933824.

The previous prime is 31133401217. The next prime is 31133401267. The reversal of 31133401240 is 4210433113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13418410 + ... + 13420729.

Almost surely, 2^31133401240 is an apocalyptic number.

It is an amenable number.

31133401240 is an abundant number, since it is smaller than the sum of its proper divisors (41332276760).

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

31133401240 is a wasteful number, since it uses less digits than its factorization.

31133401240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26839179 (or 26839175 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 31133401240 its reverse (4210433113), we get a palindrome (35343834353).

The spelling of 31133401240 in words is "thirty-one billion, one hundred thirty-three million, four hundred one thousand, two hundred forty".