5131240221 has 8 divisors (see below), whose sum is σ = 6846025984. Its totient is φ = 3418640640.

The previous prime is 5131240217. The next prime is 5131240229. The reversal of 5131240221 is 1220421315.

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

It is not a de Polignac number, because 5131240221 - 2² = 5131240217 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 (5131240229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 541060 + ... + 550461.

It is an arithmetic number, because the mean of its divisors is an integer number (855753248).

Almost surely, 2^5131240221 is an apocalyptic number.

It is an amenable number.

5131240221 is a deficient number, since it is larger than the sum of its proper divisors (1714785763).

5131240221 is a wasteful number, since it uses less digits than its factorization.

5131240221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093091.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 5131240221 is about 71632.6756515489. The cubic root of 5131240221 is about 1724.8080969464.

Adding to 5131240221 its reverse (1220421315), we get a palindrome (6351661536).

The spelling of 5131240221 in words is "five billion, one hundred thirty-one million, two hundred forty thousand, two hundred twenty-one".