55144469 has 2 divisors, whose sum is σ = 55144470. Its totient is φ = 55144468.

The previous prime is 55144423. The next prime is 55144477. The reversal of 55144469 is 96444155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48121969 + 7022500 = 6937^2 + 2650^2 .

It is a cyclic number.

It is not a de Polignac number, because 55144469 - 2²⁰ = 54095893 is a prime.

It is a super-2 number, since 2×55144469² = 6081824922583922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55144499) 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, 27572234 + 27572235.

It is an arithmetic number, because the mean of its divisors is an integer number (27572235).

Almost surely, 2^55144469 is an apocalyptic number.

It is an amenable number.

55144469 is a deficient number, since it is larger than the sum of its proper divisors (1).

55144469 is an equidigital number, since it uses as much as digits as its factorization.

55144469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 38.

The square root of 55144469 is about 7425.9321973743. The cubic root of 55144469 is about 380.6279299514.

The spelling of 55144469 in words is "fifty-five million, one hundred forty-four thousand, four hundred sixty-nine".