55429891 has 16 divisors (see below), whose sum is σ = 63618048. Its totient is φ = 47829600.

The previous prime is 55429883. The next prime is 55429901. The reversal of 55429891 is 19892455.

55429891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 55429891 - 2³ = 55429883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55429831) 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 15 ways as a sum of consecutive naturals, for example, 16540 + ... + 19606.

It is an arithmetic number, because the mean of its divisors is an integer number (3976128).

Almost surely, 2^55429891 is an apocalyptic number.

55429891 is a deficient number, since it is larger than the sum of its proper divisors (8188157).

55429891 is a wasteful number, since it uses less digits than its factorization.

55429891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3162.

The product of its digits is 129600, while the sum is 43.

The square root of 55429891 is about 7445.1253179513. The cubic root of 55429891 is about 381.2834969762.

The spelling of 55429891 in words is "fifty-five million, four hundred twenty-nine thousand, eight hundred ninety-one".