5631221366 has 8 divisors (see below), whose sum is σ = 8448390720. Its totient is φ = 2815091128.

The previous prime is 5631221347. The next prime is 5631221417. The reversal of 5631221366 is 6631221365.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246086 + ... + 267993.

It is an arithmetic number, because the mean of its divisors is an integer number (1056048840).

Almost surely, 2^5631221366 is an apocalyptic number.

5631221366 is a deficient number, since it is larger than the sum of its proper divisors (2817169354).

5631221366 is a wasteful number, since it uses less digits than its factorization.

5631221366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519558.

The product of its digits is 38880, while the sum is 35.

The square root of 5631221366 is about 75041.4643114059. The cubic root of 5631221366 is about 1779.1020768910.

Subtracting 5631221366 from its reverse (6631221365), we obtain a palindrome (999999999).

The spelling of 5631221366 in words is "five billion, six hundred thirty-one million, two hundred twenty-one thousand, three hundred sixty-six".