55122331 has 4 divisors (see below), whose sum is σ = 60133464. Its totient is φ = 50111200.

The previous prime is 55122323. The next prime is 55122337. The reversal of 55122331 is 13322155.

55122331 is digitally balanced in base 2, 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.

It is a cyclic number.

It is not a de Polignac number, because 55122331 - 2³ = 55122323 is a prime.

It is a super-2 number, since 2×55122331² = 6076942749747122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55122337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2505550 + ... + 2505571.

It is an arithmetic number, because the mean of its divisors is an integer number (15033366).

Almost surely, 2^55122331 is an apocalyptic number.

55122331 is a deficient number, since it is larger than the sum of its proper divisors (5011133).

55122331 is a wasteful number, since it uses less digits than its factorization.

55122331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5011132.

The product of its digits is 900, while the sum is 22.

The square root of 55122331 is about 7424.4414604736. The cubic root of 55122331 is about 380.5769881911.

Adding to 55122331 its reverse (13322155), we get a palindrome (68444486).

The spelling of 55122331 in words is "fifty-five million, one hundred twenty-two thousand, three hundred thirty-one".