31425133320 has 192 divisors, whose sum is σ = 118635978240. Its totient is φ = 7065100800.

The previous prime is 31425133309. The next prime is 31425133343. The reversal of 31425133320 is 2333152413.

31425133320 is a `hidden beast` number, since 3 + 142 + 513 + 3 + 3 + 2 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 51505 + ... + 255935.

It is an arithmetic number, because the mean of its divisors is an integer number (617895720).

Almost surely, 2^31425133320 is an apocalyptic number.

31425133320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31425133320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59317989120).

31425133320 is an abundant number, since it is smaller than the sum of its proper divisors (87210844920).

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

31425133320 is a wasteful number, since it uses less digits than its factorization.

31425133320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204516 (or 204509 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

Adding to 31425133320 its reverse (2333152413), we get a palindrome (33758285733).

The spelling of 31425133320 in words is "thirty-one billion, four hundred twenty-five million, one hundred thirty-three thousand, three hundred twenty".