2551801 has 4 divisors (see below), whose sum is σ = 2916352. Its totient is φ = 2187252.

The previous prime is 2551793. The next prime is 2551817. The reversal of 2551801 is 1081552.

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 a cyclic number.

It is not a de Polignac number, because 2551801 - 2³ = 2551793 is a prime.

It is a Duffinian number.

2551801 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2551831) 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, 182265 + ... + 182278.

It is an arithmetic number, because the mean of its divisors is an integer number (729088).

2^2551801 is an apocalyptic number.

It is an amenable number.

2551801 is a deficient number, since it is larger than the sum of its proper divisors (364551).

2551801 is an equidigital number, since it uses as much as digits as its factorization.

2551801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364550.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 2551801 is about 1597.4357577067. The cubic root of 2551801 is about 136.6518769110.

The spelling of 2551801 in words is "two million, five hundred fifty-one thousand, eight hundred one".