5131553221 has 4 divisors (see below), whose sum is σ = 5250891712. Its totient is φ = 5012214732.

The previous prime is 5131553213. The next prime is 5131553239. The reversal of 5131553221 is 1223551315.

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 5131553221 - 2³ = 5131553213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5131553221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5131553281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59669181 + ... + 59669266.

It is an arithmetic number, because the mean of its divisors is an integer number (1312722928).

Almost surely, 2^5131553221 is an apocalyptic number.

It is an amenable number.

5131553221 is a deficient number, since it is larger than the sum of its proper divisors (119338491).

5131553221 is a wasteful number, since it uses less digits than its factorization.

5131553221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119338490.

The product of its digits is 4500, while the sum is 28.

The square root of 5131553221 is about 71634.8603753787. The cubic root of 5131553221 is about 1724.8431666979.

The spelling of 5131553221 in words is "five billion, one hundred thirty-one million, five hundred fifty-three thousand, two hundred twenty-one".