31285230120 has 96 divisors (see below), whose sum is σ = 104425069320. Its totient is φ = 8117245440.

The previous prime is 31285230107. The next prime is 31285230139. The reversal of 31285230120 is 2103258213.

31285230120 is a `hidden beast` number, since 3 + 12 + 8 + 523 + 0 + 120 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 30777088356 + 508141764 = 175434^2 + 22542^2 .

It is a super-2 number, since 2×31285230120² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1161051 + ... + 1187690.

Almost surely, 2^31285230120 is an apocalyptic number.

31285230120 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31285230120 is an abundant number, since it is smaller than the sum of its proper divisors (73139839200).

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

31285230120 is a wasteful number, since it uses less digits than its factorization.

31285230120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2348795 (or 2348788 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 31285230120 its reverse (2103258213), we get a palindrome (33388488333).

The spelling of 31285230120 in words is "thirty-one billion, two hundred eighty-five million, two hundred thirty thousand, one hundred twenty".