5501731221 has 24 divisors (see below), whose sum is σ = 9481443840. Its totient is φ = 3143845656.

The previous prime is 5501731189. The next prime is 5501731229. The reversal of 5501731221 is 1221371055.

It is not a de Polignac number, because 5501731221 - 2⁵ = 5501731189 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5501731229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2077941 + ... + 2080586.

It is an arithmetic number, because the mean of its divisors is an integer number (395060160).

Almost surely, 2^5501731221 is an apocalyptic number.

It is an amenable number.

5501731221 is a deficient number, since it is larger than the sum of its proper divisors (3979712619).

5501731221 is a wasteful number, since it uses less digits than its factorization.

5501731221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4158550 (or 4158537 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 5501731221 is about 74173.6558422193. The cubic root of 5501731221 is about 1765.3593546940.

The spelling of 5501731221 in words is "five billion, five hundred one million, seven hundred thirty-one thousand, two hundred twenty-one".