2540551 has 4 divisors (see below), whose sum is σ = 2735992. Its totient is φ = 2345112.

The previous prime is 2540539. The next prime is 2540563. The reversal of 2540551 is 1550452.

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

It is an interprime number because it is at equal distance from previous prime (2540539) and next prime (2540563).

It is a cyclic number.

It is not a de Polignac number, because 2540551 - 2⁵ = 2540519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540581) 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, 97701 + ... + 97726.

It is an arithmetic number, because the mean of its divisors is an integer number (683998).

2^2540551 is an apocalyptic number.

2540551 is a deficient number, since it is larger than the sum of its proper divisors (195441).

2540551 is a wasteful number, since it uses less digits than its factorization.

2540551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195440.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 2540551 is about 1593.9105997514. The cubic root of 2540551 is about 136.4507642649.

Subtracting from 2540551 its reverse (1550452), we obtain a palindrome (990099).

The spelling of 2540551 in words is "two million, five hundred forty thousand, five hundred fifty-one".