2251891284 has 12 divisors (see below), whose sum is σ = 5254413024. Its totient is φ = 750630424.

The previous prime is 2251891231. The next prime is 2251891303. The reversal of 2251891284 is 4821981522.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 93828792 + ... + 93828815.

It is an arithmetic number, because the mean of its divisors is an integer number (437867752).

Almost surely, 2^2251891284 is an apocalyptic number.

It is an amenable number.

2251891284 is an abundant number, since it is smaller than the sum of its proper divisors (3002521740).

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

2251891284 is a wasteful number, since it uses less digits than its factorization.

2251891284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187657614 (or 187657612 counting only the distinct ones).

The product of its digits is 92160, while the sum is 42.

The square root of 2251891284 is about 47454.0965987132. The cubic root of 2251891284 is about 1310.7377473366.

The spelling of 2251891284 in words is "two billion, two hundred fifty-one million, eight hundred ninety-one thousand, two hundred eighty-four".