55432905 has 16 divisors (see below), whose sum is σ = 96755904. Its totient is φ = 26876480.

The previous prime is 55432873. The next prime is 55432913. The reversal of 55432905 is 50923455.

It is not a de Polignac number, because 55432905 - 2⁵ = 55432873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167814 + ... + 168143.

It is an arithmetic number, because the mean of its divisors is an integer number (6047244).

Almost surely, 2^55432905 is an apocalyptic number.

55432905 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

55432905 is a deficient number, since it is larger than the sum of its proper divisors (41322999).

55432905 is a wasteful number, since it uses less digits than its factorization.

55432905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335976.

The product of its (nonzero) digits is 27000, while the sum is 33.

The square root of 55432905 is about 7445.3277295227. The cubic root of 55432905 is about 381.2904076136.

It can be divided in two parts, 5543 and 2905, that added together give a palindrome (8448).

The spelling of 55432905 in words is "fifty-five million, four hundred thirty-two thousand, nine hundred five".