5638251 has 8 divisors (see below), whose sum is σ = 7630144. Its totient is φ = 3702600.

The previous prime is 5638247. The next prime is 5638253. The reversal of 5638251 is 1528365.

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

It is not a de Polignac number, because 5638251 - 2² = 5638247 is a prime.

It is an Ulam number.

It is the 2375-th Hogben number.

It is a Duffinian number.

5638251 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (5638253) by changing a digit.

It is a nontrivial repunit in base 2374.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13825 + ... + 14226.

It is an arithmetic number, because the mean of its divisors is an integer number (953768).

Almost surely, 2^5638251 is an apocalyptic number.

5638251 is a deficient number, since it is larger than the sum of its proper divisors (1991893).

5638251 is a wasteful number, since it uses less digits than its factorization.

5638251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28121.

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

The square root of 5638251 is about 2374.5001579280. The cubic root of 5638251 is about 177.9842072425.

The spelling of 5638251 in words is "five million, six hundred thirty-eight thousand, two hundred fifty-one".