31505130054040 has 16 divisors (see below), whose sum is σ = 70886542621680. Its totient is φ = 12602052021600.

The previous prime is 31505130054017. The next prime is 31505130054061. The reversal of 31505130054040 is 4045003150513.

It is a junction number, because it is equal to n+sod(n) for n = 31505130053993 and 31505130054011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 393814125636 + ... + 393814125715.

It is an arithmetic number, because the mean of its divisors is an integer number (4430408913855).

Almost surely, 2^{31505130054040} is an apocalyptic number.

It is an amenable number.

31505130054040 is an abundant number, since it is smaller than the sum of its proper divisors (39381412567640).

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

31505130054040 is a wasteful number, since it uses less digits than its factorization.

31505130054040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787628251362 (or 787628251358 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The spelling of 31505130054040 in words is "thirty-one trillion, five hundred five billion, one hundred thirty million, fifty-four thousand, forty".