2251564 has 24 divisors (see below), whose sum is σ = 4555040. Its totient is φ = 953856.

The previous prime is 2251559. The next prime is 2251573. The reversal of 2251564 is 4651522.

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, 2302 + ... + 3130.

2^2251564 is an apocalyptic number.

It is an amenable number.

2251564 is an abundant number, since it is smaller than the sum of its proper divisors (2303476).

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

2251564 is a wasteful number, since it uses less digits than its factorization.

2251564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937 (or 935 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 2251564 is about 1500.5212427687. The cubic root of 2251564 is about 131.0674244526.

The spelling of 2251564 in words is "two million, two hundred fifty-one thousand, five hundred sixty-four".