55500405 has 16 divisors (see below), whose sum is σ = 89031744. Its totient is φ = 29523200.

The previous prime is 55500391. The next prime is 55500413. The reversal of 55500405 is 50400555.

It is not a de Polignac number, because 55500405 - 2¹⁵ = 55467637 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1402 + ... + 10628.

It is an arithmetic number, because the mean of its divisors is an integer number (5564484).

Almost surely, 2^55500405 is an apocalyptic number.

It is an amenable number.

55500405 is a deficient number, since it is larger than the sum of its proper divisors (33531339).

55500405 is a wasteful number, since it uses less digits than its factorization.

55500405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9636.

The product of its (nonzero) digits is 2500, while the sum is 24.

The square root of 55500405 is about 7449.8593946463. The cubic root of 55500405 is about 381.4451091276.

The spelling of 55500405 in words is "fifty-five million, five hundred thousand, four hundred five".