2551387 has 4 divisors (see below), whose sum is σ = 2557000. Its totient is φ = 2545776.

The previous prime is 2551369. The next prime is 2551397. The reversal of 2551387 is 7831552.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2551387 - 2¹⁵ = 2518619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2551357) 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, 2058 + ... + 3055.

It is an arithmetic number, because the mean of its divisors is an integer number (639250).

2^2551387 is an apocalyptic number.

2551387 is a deficient number, since it is larger than the sum of its proper divisors (5613).

2551387 is an equidigital number, since it uses as much as digits as its factorization.

2551387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5612.

The product of its digits is 8400, while the sum is 31.

The square root of 2551387 is about 1597.3061697746. The cubic root of 2551387 is about 136.6444864527.

It can be divided in two parts, 25513 and 87, that added together give a square (25600 = 160²).

The spelling of 2551387 in words is "two million, five hundred fifty-one thousand, three hundred eighty-seven".