2551723 has 2 divisors, whose sum is σ = 2551724. Its totient is φ = 2551722.

The previous prime is 2551709. The next prime is 2551729. The reversal of 2551723 is 3271552.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2551723 is a prime.

It is a super-2 number, since 2×2551723² = 13022580537458, which contains 22 as substring.

2551723 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2551729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275861 + 1275862.

It is an arithmetic number, because the mean of its divisors is an integer number (1275862).

2^2551723 is an apocalyptic number.

2551723 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551723 is an equidigital number, since it uses as much as digits as its factorization.

2551723 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2551723 is about 1597.4113433928. The cubic root of 2551723 is about 136.6504845669.

The spelling of 2551723 in words is "two million, five hundred fifty-one thousand, seven hundred twenty-three".