31425519120 has 80 divisors (see below), whose sum is σ = 97560606912. Its totient is φ = 8367966720.

The previous prime is 31425519109. The next prime is 31425519127. The reversal of 31425519120 is 2191552413.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×31425519120² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31425519127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71094 + ... + 260586.

Almost surely, 2^31425519120 is an apocalyptic number.

31425519120 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 31425519120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48780303456).

31425519120 is an abundant number, since it is smaller than the sum of its proper divisors (66135087792).

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

31425519120 is a wasteful number, since it uses less digits than its factorization.

31425519120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190200 (or 190194 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The spelling of 31425519120 in words is "thirty-one billion, four hundred twenty-five million, five hundred nineteen thousand, one hundred twenty".