55085398 has 4 divisors (see below), whose sum is σ = 82628100. Its totient is φ = 27542698.

The previous prime is 55085309. The next prime is 55085399. The reversal of 55085398 is 89358055.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89358055 = 5 ⋅17871611.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55085399) 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, 13771348 + ... + 13771351.

It is an arithmetic number, because the mean of its divisors is an integer number (20657025).

Almost surely, 2^55085398 is an apocalyptic number.

55085398 is a deficient number, since it is larger than the sum of its proper divisors (27542702).

55085398 is a wasteful number, since it uses less digits than its factorization.

55085398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27542701.

The product of its (nonzero) digits is 216000, while the sum is 43.

The square root of 55085398 is about 7421.9537858976. The cubic root of 55085398 is about 380.4919712839.

The spelling of 55085398 in words is "fifty-five million, eighty-five thousand, three hundred ninety-eight".