55145449 has 4 divisors (see below), whose sum is σ = 55809936. Its totient is φ = 54480964.

The previous prime is 55145417. The next prime is 55145473. The reversal of 55145449 is 94454155.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55145449 - 2⁵ = 55145417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55145549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332119 + ... + 332284.

It is an arithmetic number, because the mean of its divisors is an integer number (13952484).

Almost surely, 2^55145449 is an apocalyptic number.

It is an amenable number.

55145449 is a deficient number, since it is larger than the sum of its proper divisors (664487).

55145449 is an equidigital number, since it uses as much as digits as its factorization.

55145449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664486.

The product of its digits is 72000, while the sum is 37.

The square root of 55145449 is about 7425.9981820628. The cubic root of 55145449 is about 380.6301847146.

The spelling of 55145449 in words is "fifty-five million, one hundred forty-five thousand, four hundred forty-nine".