2551340 has 24 divisors (see below), whose sum is σ = 5845392. Its totient is φ = 927680.

The previous prime is 2551313. The next prime is 2551349. The reversal of 2551340 is 431552.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2551349) 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, 5579 + ... + 6018.

It is an arithmetic number, because the mean of its divisors is an integer number (243558).

2^2551340 is an apocalyptic number.

2551340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2551340 is an abundant number, since it is smaller than the sum of its proper divisors (3294052).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2551340 is a wasteful number, since it uses less digits than its factorization.

2551340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11617 (or 11615 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 2551340 is about 1597.2914574366. The cubic root of 2551340 is about 136.6436473888.

Adding to 2551340 its reverse (431552), we get a palindrome (2982892).

The spelling of 2551340 in words is "two million, five hundred fifty-one thousand, three hundred forty".