2551539 has 8 divisors (see below), whose sum is σ = 3413200. Its totient is φ = 1695456.

The previous prime is 2551531. The next prime is 2551543. The reversal of 2551539 is 9351552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2551539 - 2³ = 2551531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2551531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172 + ... + 2265.

It is an arithmetic number, because the mean of its divisors is an integer number (426650).

2^2551539 is an apocalyptic number.

2551539 is a deficient number, since it is larger than the sum of its proper divisors (861661).

2551539 is a wasteful number, since it uses less digits than its factorization.

2551539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2789.

The product of its digits is 6750, while the sum is 30.

The square root of 2551539 is about 1597.3537491739. The cubic root of 2551539 is about 136.6471999506.

The spelling of 2551539 in words is "two million, five hundred fifty-one thousand, five hundred thirty-nine".