2553691 has 8 divisors (see below), whose sum is σ = 2928384. Its totient is φ = 2181480.

The previous prime is 2553671. The next prime is 2553701. The reversal of 2553691 is 1963552.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2553691 - 2⁵ = 2553659 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 (2553601) 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, 3066 + ... + 3808.

It is an arithmetic number, because the mean of its divisors is an integer number (366048).

2^2553691 is an apocalyptic number.

2553691 is a deficient number, since it is larger than the sum of its proper divisors (374693).

2553691 is an equidigital number, since it uses as much as digits as its factorization.

2553691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241.

The product of its digits is 8100, while the sum is 31.

The square root of 2553691 is about 1598.0272212951. The cubic root of 2553691 is about 136.6856058094.

The spelling of 2553691 in words is "two million, five hundred fifty-three thousand, six hundred ninety-one".