31113001240 has 32 divisors (see below), whose sum is σ = 70057126080. Its totient is φ = 12435800832.

The previous prime is 31113001237. The next prime is 31113001253. The reversal of 31113001240 is 4210031113.

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, 239997 + ... + 346156.

It is an arithmetic number, because the mean of its divisors is an integer number (2189285190).

Almost surely, 2^31113001240 is an apocalyptic number.

It is an amenable number.

31113001240 is an abundant number, since it is smaller than the sum of its proper divisors (38944124840).

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

31113001240 is a wasteful number, since it uses less digits than its factorization.

31113001240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 587491 (or 587487 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 31113001240 its reverse (4210031113), we get a palindrome (35323032353).

The spelling of 31113001240 in words is "thirty-one billion, one hundred thirteen million, one thousand, two hundred forty".