2551617 has 12 divisors (see below), whose sum is σ = 3699540. Its totient is φ = 1694688.

The previous prime is 2551607. The next prime is 2551639. The reversal of 2551617 is 7161552.

It can be written as a sum of positive squares in 2 ways, for example, as 1089936 + 1461681 = 1044^2 + 1209^2 .

It is not a de Polignac number, because 2551617 - 2¹⁴ = 2535233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2551607) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4303 + ... + 4859.

It is an arithmetic number, because the mean of its divisors is an integer number (308295).

2^2551617 is an apocalyptic number.

It is an amenable number.

2551617 is a deficient number, since it is larger than the sum of its proper divisors (1147923).

2551617 is a wasteful number, since it uses less digits than its factorization.

2551617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1072 (or 1069 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 2551617 is about 1597.3781643681. The cubic root of 2551617 is about 136.6485923616.

The spelling of 2551617 in words is "two million, five hundred fifty-one thousand, six hundred seventeen".