31489031200 has 144 divisors (see below), whose sum is σ = 86566959360. Its totient is φ = 11081088000.

The previous prime is 31489031131. The next prime is 31489031207. The reversal of 31489031200 is 213098413.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (31489031207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 215086 + ... + 330514.

It is an arithmetic number, because the mean of its divisors is an integer number (601159440).

Almost surely, 2^31489031200 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31489031200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43283479680).

31489031200 is an abundant number, since it is smaller than the sum of its proper divisors (55077928160).

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

31489031200 is a wasteful number, since it uses less digits than its factorization.

31489031200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115491 (or 115478 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 31489031200 in words is "thirty-one billion, four hundred eighty-nine million, thirty-one thousand, two hundred".