5531907221 has 4 divisors (see below), whose sum is σ = 5553946944. Its totient is φ = 5509867500.

The previous prime is 5531907217. The next prime is 5531907233. The reversal of 5531907221 is 1227091355.

5531907221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5531907221 - 2² = 5531907217 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 (5531907281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11019485 + ... + 11019986.

It is an arithmetic number, because the mean of its divisors is an integer number (1388486736).

Almost surely, 2^5531907221 is an apocalyptic number.

It is an amenable number.

5531907221 is a deficient number, since it is larger than the sum of its proper divisors (22039723).

5531907221 is a wasteful number, since it uses less digits than its factorization.

5531907221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22039722.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 5531907221 is about 74376.7922204232. The cubic root of 5531907221 is about 1768.5810306010.

Adding to 5531907221 its reverse (1227091355), we get a palindrome (6758998576).

The spelling of 5531907221 in words is "five billion, five hundred thirty-one million, nine hundred seven thousand, two hundred twenty-one".