2551397 has 2 divisors, whose sum is σ = 2551398. Its totient is φ = 2551396.

The previous prime is 2551369. The next prime is 2551403. The reversal of 2551397 is 7931552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2307361 + 244036 = 1519^2 + 494^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2551397 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2551357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275698 + 1275699.

It is an arithmetic number, because the mean of its divisors is an integer number (1275699).

2^2551397 is an apocalyptic number.

It is an amenable number.

2551397 is a deficient number, since it is larger than the sum of its proper divisors (1).

2551397 is an equidigital number, since it uses as much as digits as its factorization.

2551397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9450, while the sum is 32.

The square root of 2551397 is about 1597.3093000418. The cubic root of 2551397 is about 136.6446649756.

The spelling of 2551397 in words is "two million, five hundred fifty-one thousand, three hundred ninety-seven".