2251188818 has 16 divisors (see below), whose sum is σ = 3555433440. Its totient is φ = 1066075200.

The previous prime is 2251188803. The next prime is 2251188827. The reversal of 2251188818 is 8188811522.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274538 + ... + 282618.

It is an arithmetic number, because the mean of its divisors is an integer number (222214590).

Almost surely, 2^2251188818 is an apocalyptic number.

2251188818 is a deficient number, since it is larger than the sum of its proper divisors (1304244622).

2251188818 is a wasteful number, since it uses less digits than its factorization.

2251188818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15433.

The product of its digits is 81920, while the sum is 44.

The square root of 2251188818 is about 47446.6944897113. The cubic root of 2251188818 is about 1310.6014405106.

The spelling of 2251188818 in words is "two billion, two hundred fifty-one million, one hundred eighty-eight thousand, eight hundred eighteen".