55149443 has 2 divisors, whose sum is σ = 55149444. Its totient is φ = 55149442.

The previous prime is 55149439. The next prime is 55149449. The reversal of 55149443 is 34494155.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55149443 - 2² = 55149439 is a prime.

It is a super-2 number, since 2×55149443² = 6082922126420498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (55149449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27574721 + 27574722.

It is an arithmetic number, because the mean of its divisors is an integer number (27574722).

Almost surely, 2^55149443 is an apocalyptic number.

55149443 is a deficient number, since it is larger than the sum of its proper divisors (1).

55149443 is an equidigital number, since it uses as much as digits as its factorization.

55149443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 35.

The square root of 55149443 is about 7426.2670972703. The cubic root of 55149443 is about 380.6393737489.

It can be divided in two parts, 551 and 49443, that added together give a palindrome (49994).

The spelling of 55149443 in words is "fifty-five million, one hundred forty-nine thousand, four hundred forty-three".