2256623 has 2 divisors, whose sum is σ = 2256624. Its totient is φ = 2256622.

The previous prime is 2256619. The next prime is 2256629. The reversal of 2256623 is 3266522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2256623 - 2² = 2256619 is a prime.

It is a Sophie Germain prime.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 2256592 and 2256601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2256629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128311 + 1128312.

It is an arithmetic number, because the mean of its divisors is an integer number (1128312).

2^2256623 is an apocalyptic number.

2256623 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256623 is an equidigital number, since it uses as much as digits as its factorization.

2256623 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 26.

The square root of 2256623 is about 1502.2060444560. The cubic root of 2256623 is about 131.1655153953.

The spelling of 2256623 in words is "two million, two hundred fifty-six thousand, six hundred twenty-three".