31255400000 has 168 divisors, whose sum is σ = 84576586752. Its totient is φ = 11364800000.

The previous prime is 31255399999. The next prime is 31255400023. The reversal of 31255400000 is 455213.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 2192897 + ... + 2207103.

It is an arithmetic number, because the mean of its divisors is an integer number (503432064).

Almost surely, 2^31255400000 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 31255400000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42288293376).

31255400000 is an abundant number, since it is smaller than the sum of its proper divisors (53321186752).

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

31255400000 is an equidigital number, since it uses as much as digits as its factorization.

31255400000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14255 (or 14225 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

Adding to 31255400000 its reverse (455213), we get a palindrome (31255855213).

The spelling of 31255400000 in words is "thirty-one billion, two hundred fifty-five million, four hundred thousand".