2553681 has 8 divisors (see below), whose sum is σ = 3666880. Its totient is φ = 1571472.

The previous prime is 2553671. The next prime is 2553701. The reversal of 2553681 is 1863552.

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

It is not a de Polignac number, because 2553681 - 2¹⁰ = 2552657 is a prime.

It is a super-2 number, since 2×2553681² = 13042573299522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2553601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32701 + ... + 32778.

It is an arithmetic number, because the mean of its divisors is an integer number (458360).

2^2553681 is an apocalyptic number.

It is an amenable number.

2553681 is a deficient number, since it is larger than the sum of its proper divisors (1113199).

2553681 is a wasteful number, since it uses less digits than its factorization.

2553681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65495.

The product of its digits is 7200, while the sum is 30.

The square root of 2553681 is about 1598.0240924342. The cubic root of 2553681 is about 136.6854273935.

The spelling of 2553681 in words is "two million, five hundred fifty-three thousand, six hundred eighty-one".