55085149 has 4 divisors (see below), whose sum is σ = 62954464. Its totient is φ = 47215836.

The previous prime is 55085131. The next prime is 55085153. The reversal of 55085149 is 94158055.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94158055 = 5 ⋅18831611.

It is a cyclic number.

It is not a de Polignac number, because 55085149 - 2⁹ = 55084637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55085159) 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 in 3 ways as a sum of consecutive naturals, for example, 3934647 + ... + 3934660.

It is an arithmetic number, because the mean of its divisors is an integer number (15738616).

Almost surely, 2^55085149 is an apocalyptic number.

It is an amenable number.

55085149 is a deficient number, since it is larger than the sum of its proper divisors (7869315).

55085149 is an equidigital number, since it uses as much as digits as its factorization.

55085149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7869314.

The product of its (nonzero) digits is 36000, while the sum is 37.

The square root of 55085149 is about 7421.9370113199. The cubic root of 55085149 is about 380.4913979762.

The spelling of 55085149 in words is "fifty-five million, eighty-five thousand, one hundred forty-nine".