55447129 has 4 divisors (see below), whose sum is σ = 56799540. Its totient is φ = 54094720.

The previous prime is 55447121. The next prime is 55447153. The reversal of 55447129 is 92174455.

55447129 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 can be written as a sum of positive squares in 2 ways, for example, as 18905104 + 36542025 = 4348^2 + 6045^2 .

It is a cyclic number.

It is not a de Polignac number, because 55447129 - 2³ = 55447121 is a prime.

It is a super-2 number, since 2×55447129² = 6148768228685282, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55447121) 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, 676144 + ... + 676225.

It is an arithmetic number, because the mean of its divisors is an integer number (14199885).

Almost surely, 2^55447129 is an apocalyptic number.

It is an amenable number.

55447129 is a deficient number, since it is larger than the sum of its proper divisors (1352411).

55447129 is a wasteful number, since it uses less digits than its factorization.

55447129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352410.

The product of its digits is 50400, while the sum is 37.

The square root of 55447129 is about 7446.2828981983. The cubic root of 55447129 is about 381.3230176728.

The spelling of 55447129 in words is "fifty-five million, four hundred forty-seven thousand, one hundred twenty-nine".