2257191 has 6 divisors (see below), whose sum is σ = 3260400. Its totient is φ = 1504788.

The previous prime is 2257187. The next prime is 2257193. The reversal of 2257191 is 1917522.

2257191 is a `hidden beast` number, since 2 + 2 + 571 + 91 = 666.

It is not a de Polignac number, because 2257191 - 2² = 2257187 is a prime.

It is a super-2 number, since 2×2257191² = 10189822420962, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2257193) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 125391 + ... + 125408.

It is an arithmetic number, because the mean of its divisors is an integer number (543400).

2^2257191 is an apocalyptic number.

2257191 is a deficient number, since it is larger than the sum of its proper divisors (1003209).

2257191 is a wasteful number, since it uses less digits than its factorization.

2257191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250805 (or 250802 counting only the distinct ones).

The product of its digits is 1260, while the sum is 27.

The square root of 2257191 is about 1502.3950878514. The cubic root of 2257191 is about 131.1765194136.

The spelling of 2257191 in words is "two million, two hundred fifty-seven thousand, one hundred ninety-one".