9931425870 has 16 divisors (see below), whose sum is σ = 23835422160. Its totient is φ = 2648380224.

The previous prime is 9931425863. The next prime is 9931425883. The reversal of 9931425870 is 785241399.

It is a super-2 number, since 2×9931425870² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

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, 165523735 + ... + 165523794.

It is an arithmetic number, because the mean of its divisors is an integer number (1489713885).

Almost surely, 2^9931425870 is an apocalyptic number.

9931425870 is an abundant number, since it is smaller than the sum of its proper divisors (13903996290).

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

9931425870 is a wasteful number, since it uses less digits than its factorization.

9931425870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331047539.

The product of its (nonzero) digits is 544320, while the sum is 48.

The square root of 9931425870 is about 99656.5395245089. The cubic root of 9931425870 is about 2149.4987740912.

The spelling of 9931425870 in words is "nine billion, nine hundred thirty-one million, four hundred twenty-five thousand, eight hundred seventy".