55422331 has 2 divisors, whose sum is σ = 55422332. Its totient is φ = 55422330.

The previous prime is 55422317. The next prime is 55422349. The reversal of 55422331 is 13322455.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55422331 - 2¹⁵ = 55389563 is a prime.

It is a super-2 number, since 2×55422331² = 6143269546947122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55422296 and 55422305.

It is not a weakly prime, because it can be changed into another prime (55422361) 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 as a sum of consecutive naturals, namely, 27711165 + 27711166.

It is an arithmetic number, because the mean of its divisors is an integer number (27711166).

Almost surely, 2^55422331 is an apocalyptic number.

55422331 is a deficient number, since it is larger than the sum of its proper divisors (1).

55422331 is an equidigital number, since it uses as much as digits as its factorization.

55422331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 25.

The square root of 55422331 is about 7444.6175858804. The cubic root of 55422331 is about 381.2661619593.

Adding to 55422331 its reverse (13322455), we get a palindrome (68744786).

The spelling of 55422331 in words is "fifty-five million, four hundred twenty-two thousand, three hundred thirty-one".