55478523 has 4 divisors (see below), whose sum is σ = 73971368. Its totient is φ = 36985680.

The previous prime is 55478519. The next prime is 55478551. The reversal of 55478523 is 32587455.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 55478523 - 2² = 55478519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55478513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9246418 + ... + 9246423.

It is an arithmetic number, because the mean of its divisors is an integer number (18492842).

Almost surely, 2^55478523 is an apocalyptic number.

55478523 is a deficient number, since it is larger than the sum of its proper divisors (18492845).

55478523 is a wasteful number, since it uses less digits than its factorization.

55478523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18492844.

The product of its digits is 168000, while the sum is 39.

The square root of 55478523 is about 7448.3906315391. The cubic root of 55478523 is about 381.3949720816.

The spelling of 55478523 in words is "fifty-five million, four hundred seventy-eight thousand, five hundred twenty-three".