2251118844 has 48 divisors (see below), whose sum is σ = 6285179040. Its totient is φ = 692651520.

The previous prime is 2251118839. The next prime is 2251118923. The reversal of 2251118844 is 4488111522.

2251118844 is a `hidden beast` number, since 22 + 511 + 1 + 88 + 44 = 666.

2251118844 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2251118799 and 2251118808.

It is a congruent 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, 800277 + ... + 803084.

It is an arithmetic number, because the mean of its divisors is an integer number (130941230).

Almost surely, 2^2251118844 is an apocalyptic number.

It is an amenable number.

2251118844 is an abundant number, since it is smaller than the sum of its proper divisors (4034060196).

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

2251118844 is a wasteful number, since it uses less digits than its factorization.

2251118844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1603387 (or 1603379 counting only the distinct ones).

The product of its digits is 20480, while the sum is 36.

The square root of 2251118844 is about 47445.9570880386. The cubic root of 2251118844 is about 1310.5878611706.

The spelling of 2251118844 in words is "two billion, two hundred fifty-one million, one hundred eighteen thousand, eight hundred forty-four".