2251557 has 60 divisors (see below), whose sum is σ = 4425696. Its totient is φ = 1108080.

The previous prime is 2251553. The next prime is 2251559. The reversal of 2251557 is 7551522.

It is a happy number.

It is not a de Polignac number, because 2251557 - 2² = 2251553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 2251557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251553) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 118494 + ... + 118512.

2^2251557 is an apocalyptic number.

2251557 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2251557 is a deficient number, since it is larger than the sum of its proper divisors (2174139).

2251557 is a wasteful number, since it uses less digits than its factorization.

2251557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68 (or 40 counting only the distinct ones).

The product of its digits is 3500, while the sum is 27.

The square root of 2251557 is about 1500.5189102441. The cubic root of 2251557 is about 131.0672886251.

The spelling of 2251557 in words is "two million, two hundred fifty-one thousand, five hundred fifty-seven".