2251657 has 4 divisors (see below), whose sum is σ = 2257920. Its totient is φ = 2245396.

The previous prime is 2251649. The next prime is 2251673. The reversal of 2251657 is 7561522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2251657 - 2³ = 2251649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2251637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2557 + ... + 3322.

It is an arithmetic number, because the mean of its divisors is an integer number (564480).

2^2251657 is an apocalyptic number.

It is an amenable number.

2251657 is a deficient number, since it is larger than the sum of its proper divisors (6263).

2251657 is an equidigital number, since it uses as much as digits as its factorization.

2251657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6262.

The product of its digits is 4200, while the sum is 28.

The square root of 2251657 is about 1500.5522316801. The cubic root of 2251657 is about 131.0692289912.

The spelling of 2251657 in words is "two million, two hundred fifty-one thousand, six hundred fifty-seven".