2251690 has 32 divisors (see below), whose sum is σ = 4878720. Its totient is φ = 730944.

The previous prime is 2251687. The next prime is 2251703. The reversal of 2251690 is 961522.

2251690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2251690² = 10140215712200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 484 + ... + 2176.

It is an arithmetic number, because the mean of its divisors is an integer number (152460).

2^2251690 is an apocalyptic number.

2251690 is an abundant number, since it is smaller than the sum of its proper divisors (2627030).

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

2251690 is a wasteful number, since it uses less digits than its factorization.

2251690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1726.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 2251690 is about 1500.5632275916. The cubic root of 2251690 is about 131.0698692994.

The spelling of 2251690 in words is "two million, two hundred fifty-one thousand, six hundred ninety".