2551390 has 16 divisors (see below), whose sum is σ = 4792608. Its totient is φ = 976096.

The previous prime is 2551369. The next prime is 2551397. The reversal of 2551390 is 931552.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551397) 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, 5317 + ... + 5776.

It is an arithmetic number, because the mean of its divisors is an integer number (299538).

2^2551390 is an apocalyptic number.

2551390 is a deficient number, since it is larger than the sum of its proper divisors (2241218).

2551390 is a wasteful number, since it uses less digits than its factorization.

2551390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11123.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 2551390 is about 1597.3071088554. The cubic root of 2551390 is about 136.6445400096.

It can be divided in two parts, 25 and 51390, that added together give a palindrome (51415).

The spelling of 2551390 in words is "two million, five hundred fifty-one thousand, three hundred ninety".