55075405 has 16 divisors (see below), whose sum is σ = 82399104. Its totient is φ = 34332480.

The previous prime is 55075387. The next prime is 55075417. The reversal of 55075405 is 50457055.

It is not a de Polignac number, because 55075405 - 2⁵ = 55075373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71142 + ... + 71911.

It is an arithmetic number, because the mean of its divisors is an integer number (5149944).

Almost surely, 2^55075405 is an apocalyptic number.

55075405 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55075405 is a deficient number, since it is larger than the sum of its proper divisors (27323699).

55075405 is a wasteful number, since it uses less digits than its factorization.

55075405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143076.

The product of its (nonzero) digits is 17500, while the sum is 31.

The square root of 55075405 is about 7421.2805498782. The cubic root of 55075405 is about 380.4689616398.

The spelling of 55075405 in words is "fifty-five million, seventy-five thousand, four hundred five".