2251985384 has 64 divisors (see below), whose sum is σ = 4874618880. Its totient is φ = 965272000.

The previous prime is 2251985377. The next prime is 2251985413. The reversal of 2251985384 is 4835891522.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135869 + ... + 151539.

It is an arithmetic number, because the mean of its divisors is an integer number (76165920).

Almost surely, 2^2251985384 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 2251985384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2437309440).

2251985384 is an abundant number, since it is smaller than the sum of its proper divisors (2622633496).

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

2251985384 is a wasteful number, since it uses less digits than its factorization.

2251985384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15782 (or 15778 counting only the distinct ones).

The product of its digits is 691200, while the sum is 47.

The square root of 2251985384 is about 47455.0880728295. The cubic root of 2251985384 is about 1310.7560043908.

The spelling of 2251985384 in words is "two billion, two hundred fifty-one million, nine hundred eighty-five thousand, three hundred eighty-four".