2257731 has 12 divisors (see below), whose sum is σ = 3727152. Its totient is φ = 1290096.

The previous prime is 2257721. The next prime is 2257733. The reversal of 2257731 is 1377522.

It is not a de Polignac number, because 2257731 - 2⁶ = 2257667 is a prime.

It is a super-2 number, since 2×2257731² = 10194698536722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2257695 and 2257704.

It is not an unprimeable number, because it can be changed into a prime (2257733) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17856 + ... + 17981.

It is an arithmetic number, because the mean of its divisors is an integer number (310596).

2^2257731 is an apocalyptic number.

2257731 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2257731 is a deficient number, since it is larger than the sum of its proper divisors (1469421).

2257731 is a wasteful number, since it uses less digits than its factorization.

2257731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35850 (or 35847 counting only the distinct ones).

The product of its digits is 2940, while the sum is 27.

The square root of 2257731 is about 1502.5747901519. The cubic root of 2257731 is about 131.1869792687.

The spelling of 2257731 in words is "two million, two hundred fifty-seven thousand, seven hundred thirty-one".