2551455 has 36 divisors (see below), whose sum is σ = 4647240. Its totient is φ = 1294560.

The previous prime is 2551441. The next prime is 2551457. The reversal of 2551455 is 5541552.

It is not a de Polignac number, because 2551455 - 2¹⁵ = 2518687 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551457) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 43216 + ... + 43274.

It is an arithmetic number, because the mean of its divisors is an integer number (129090).

2^2551455 is an apocalyptic number.

2551455 is a deficient number, since it is larger than the sum of its proper divisors (2095785).

2551455 is a wasteful number, since it uses less digits than its factorization.

2551455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 98 counting only the distinct ones).

The product of its digits is 5000, while the sum is 27.

The square root of 2551455 is about 1597.3274554705. The cubic root of 2551455 is about 136.6457003993.

The spelling of 2551455 in words is "two million, five hundred fifty-one thousand, four hundred fifty-five".