2257531 has 2 divisors, whose sum is σ = 2257532. Its totient is φ = 2257530.

The previous prime is 2257529. The next prime is 2257547. The reversal of 2257531 is 1357522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2257531 - 2¹ = 2257529 is a prime.

It is a super-2 number, since 2×2257531² = 10192892431922, which contains 22 as substring.

Together with 2257529, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2257496 and 2257505.

It is not a weakly prime, because it can be changed into another prime (2257511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128765 + 1128766.

It is an arithmetic number, because the mean of its divisors is an integer number (1128766).

2^2257531 is an apocalyptic number.

2257531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2257531 is an equidigital number, since it uses as much as digits as its factorization.

2257531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2100, while the sum is 25.

The square root of 2257531 is about 1502.5082362503. The cubic root of 2257531 is about 131.1831054428.

Subtracting from 2257531 its reverse (1357522), we obtain a palindrome (900009).

The spelling of 2257531 in words is "two million, two hundred fifty-seven thousand, five hundred thirty-one".