2638551 has 8 divisors (see below), whose sum is σ = 3552640. Its totient is φ = 1741752.

The previous prime is 2638543. The next prime is 2638561. The reversal of 2638551 is 1558362.

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

It is not a de Polignac number, because 2638551 - 2³ = 2638543 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 (2638501) 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, 3961 + ... + 4578.

It is an arithmetic number, because the mean of its divisors is an integer number (444080).

2^2638551 is an apocalyptic number.

2638551 is a deficient number, since it is larger than the sum of its proper divisors (914089).

2638551 is a wasteful number, since it uses less digits than its factorization.

2638551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8645.

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

The square root of 2638551 is about 1624.3617207999. The cubic root of 2638551 is about 138.1831741058.

The spelling of 2638551 in words is "two million, six hundred thirty-eight thousand, five hundred fifty-one".