55487475 has 18 divisors (see below), whose sum is σ = 99384636. Its totient is φ = 29593200.

The previous prime is 55487447. The next prime is 55487479. The reversal of 55487475 is 57478455.

It is not a de Polignac number, because 55487475 - 2⁷ = 55487347 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 55487475.

It is not an unprimeable number, because it can be changed into a prime (55487479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 123081 + ... + 123530.

Almost surely, 2^55487475 is an apocalyptic number.

55487475 is a deficient number, since it is larger than the sum of its proper divisors (43897161).

55487475 is a wasteful number, since it uses less digits than its factorization.

55487475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246627 (or 246619 counting only the distinct ones).

The product of its digits is 784000, while the sum is 45.

The square root of 55487475 is about 7448.9915424841. The cubic root of 55487475 is about 381.4154849094.

The spelling of 55487475 in words is "fifty-five million, four hundred eighty-seven thousand, four hundred seventy-five".