2251270665 has 80 divisors (see below), whose sum is σ = 4699461888. Its totient is φ = 1009666944.

The previous prime is 2251270639. The next prime is 2251270673. The reversal of 2251270665 is 5660721522.

It is not a de Polignac number, because 2251270665 - 2¹⁰ = 2251269641 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 142764 + ... + 157746.

Almost surely, 2^2251270665 is an apocalyptic number.

It is an amenable number.

2251270665 is an abundant number, since it is smaller than the sum of its proper divisors (2448191223).

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

2251270665 is a wasteful number, since it uses less digits than its factorization.

2251270665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15060 (or 15051 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The square root of 2251270665 is about 47447.5569971732. The cubic root of 2251270665 is about 1310.6173235995.

The spelling of 2251270665 in words is "two billion, two hundred fifty-one million, two hundred seventy thousand, six hundred sixty-five".