5638621231 has 8 divisors (see below), whose sum is σ = 5679175040. Its totient is φ = 5598204192.

The previous prime is 5638621229. The next prime is 5638621249. The reversal of 5638621231 is 1321268365.

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

It is a cyclic number.

It is not a de Polignac number, because 5638621231 - 2¹ = 5638621229 is a prime.

It is a super-2 number, since 2×5638621231² = 63588098773367910722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5638621211) 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, 49285 + ... + 117073.

It is an arithmetic number, because the mean of its divisors is an integer number (709896880).

Almost surely, 2^5638621231 is an apocalyptic number.

5638621231 is a deficient number, since it is larger than the sum of its proper divisors (40553809).

5638621231 is a wasteful number, since it uses less digits than its factorization.

5638621231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68385.

The product of its digits is 51840, while the sum is 37.

The square root of 5638621231 is about 75090.7532989249. The cubic root of 5638621231 is about 1779.8810288493.

Adding to 5638621231 its reverse (1321268365), we get a palindrome (6959889596).

The spelling of 5638621231 in words is "five billion, six hundred thirty-eight million, six hundred twenty-one thousand, two hundred thirty-one".