55054478 has 4 divisors (see below), whose sum is σ = 82581720. Its totient is φ = 27527238.

The previous prime is 55054477. The next prime is 55054487. The reversal of 55054478 is 87445055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87445055 = 5 ⋅17489011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55054471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13763618 + ... + 13763621.

It is an arithmetic number, because the mean of its divisors is an integer number (20645430).

Almost surely, 2^55054478 is an apocalyptic number.

55054478 is a deficient number, since it is larger than the sum of its proper divisors (27527242).

55054478 is a wasteful number, since it uses less digits than its factorization.

55054478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27527241.

The product of its (nonzero) digits is 112000, while the sum is 38.

The square root of 55054478 is about 7419.8704840449. The cubic root of 55054478 is about 380.4207666083.

The spelling of 55054478 in words is "fifty-five million, fifty-four thousand, four hundred seventy-eight".