2552809 has 4 divisors (see below), whose sum is σ = 2917504. Its totient is φ = 2188116.

The previous prime is 2552807. The next prime is 2552833. The reversal of 2552809 is 9082552.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2552809 - 2¹ = 2552807 is a prime.

It is a super-3 number, since 3×2552809³ = 49908695855532033387, which contains 333 as substring.

It is a Duffinian number.

2552809 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2552807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182337 + ... + 182350.

It is an arithmetic number, because the mean of its divisors is an integer number (729376).

2^2552809 is an apocalyptic number.

It is an amenable number.

2552809 is a deficient number, since it is larger than the sum of its proper divisors (364695).

2552809 is an equidigital number, since it uses as much as digits as its factorization.

2552809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364694.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 2552809 is about 1597.7512322011. The cubic root of 2552809 is about 136.6698677286.

The spelling of 2552809 in words is "two million, five hundred fifty-two thousand, eight hundred nine".