2556331 has 2 divisors, whose sum is σ = 2556332. Its totient is φ = 2556330.

The previous prime is 2556277. The next prime is 2556373. The reversal of 2556331 is 1336552.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2556331 - 2¹¹ = 2554283 is a prime.

It is a super-2 number, since 2×2556331² = 13069656363122, which contains 22 as substring.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹⁹ + 5⁷ + 5⁹ + 6² + 3³ + 3⁶ + 1 .

2556331 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2556296 and 2556305.

It is not a weakly prime, because it can be changed into another prime (556331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278165 + 1278166.

It is an arithmetic number, because the mean of its divisors is an integer number (1278166).

2^2556331 is an apocalyptic number.

2556331 is a deficient number, since it is larger than the sum of its proper divisors (1).

2556331 is an equidigital number, since it uses as much as digits as its factorization.

2556331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2700, while the sum is 25.

The square root of 2556331 is about 1598.8530263911. The cubic root of 2556331 is about 136.7326913446.

The spelling of 2556331 in words is "two million, five hundred fifty-six thousand, three hundred thirty-one".