5551532231 has 4 divisors (see below), whose sum is σ = 6344608272. Its totient is φ = 4758456192.

The previous prime is 5551532209. The next prime is 5551532317. The reversal of 5551532231 is 1322351555.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 5551532231 - 2¹⁴ = 5551515847 is a prime.

It is a super-2 number, since 2×5551532231² = 61639020223663674722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5551532201) 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, 396538010 + ... + 396538023.

It is an arithmetic number, because the mean of its divisors is an integer number (1586152068).

Almost surely, 2^5551532231 is an apocalyptic number.

5551532231 is a deficient number, since it is larger than the sum of its proper divisors (793076041).

5551532231 is an equidigital number, since it uses as much as digits as its factorization.

5551532231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793076040.

The product of its digits is 22500, while the sum is 32.

The square root of 5551532231 is about 74508.6050802188. The cubic root of 5551532231 is about 1770.6699700228.

Adding to 5551532231 its reverse (1322351555), we get a palindrome (6873883786).

The spelling of 5551532231 in words is "five billion, five hundred fifty-one million, five hundred thirty-two thousand, two hundred thirty-one".