55086478 has 4 divisors (see below), whose sum is σ = 82629720. Its totient is φ = 27543238.

The previous prime is 55086431. The next prime is 55086517. The reversal of 55086478 is 87468055.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87468055 = 5 ⋅17493611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13771618 + ... + 13771621.

It is an arithmetic number, because the mean of its divisors is an integer number (20657430).

Almost surely, 2^55086478 is an apocalyptic number.

55086478 is a deficient number, since it is larger than the sum of its proper divisors (27543242).

55086478 is a wasteful number, since it uses less digits than its factorization.

55086478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27543241.

The product of its (nonzero) digits is 268800, while the sum is 43.

The square root of 55086478 is about 7422.0265426634. The cubic root of 55086478 is about 380.4944578996.

The spelling of 55086478 in words is "fifty-five million, eighty-six thousand, four hundred seventy-eight".