2656231 has 4 divisors (see below), whose sum is σ = 2662432. Its totient is φ = 2650032.

The previous prime is 2656229. The next prime is 2656243. The reversal of 2656231 is 1326562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1326562 = 2 ⋅663281.

It is a cyclic number.

It is not a de Polignac number, because 2656231 - 2¹ = 2656229 is a prime.

It is a super-2 number, since 2×2656231² = 14111126250722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2656196 and 2656205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2656211) 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, 2406 + ... + 3331.

It is an arithmetic number, because the mean of its divisors is an integer number (665608).

2^2656231 is an apocalyptic number.

2656231 is a deficient number, since it is larger than the sum of its proper divisors (6201).

2656231 is an equidigital number, since it uses as much as digits as its factorization.

2656231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6200.

The product of its digits is 2160, while the sum is 25.

The square root of 2656231 is about 1629.7947723563. The cubic root of 2656231 is about 138.4911262110.

The spelling of 2656231 in words is "two million, six hundred fifty-six thousand, two hundred thirty-one".