55605129 has 4 divisors (see below), whose sum is σ = 74140176. Its totient is φ = 37070084.

The previous prime is 55605119. The next prime is 55605131. The reversal of 55605129 is 92150655.

55605129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55605129 - 2⁸ = 55604873 is a prime.

It is a super-2 number, since 2×55605129² = 6183860742213282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55605129.

It is not an unprimeable number, because it can be changed into a prime (55605119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9267519 + ... + 9267524.

It is an arithmetic number, because the mean of its divisors is an integer number (18535044).

Almost surely, 2^55605129 is an apocalyptic number.

It is an amenable number.

55605129 is a deficient number, since it is larger than the sum of its proper divisors (18535047).

55605129 is a wasteful number, since it uses less digits than its factorization.

55605129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18535046.

The product of its (nonzero) digits is 13500, while the sum is 33.

The square root of 55605129 is about 7456.8846712283. The cubic root of 55605129 is about 381.6848752990.

The spelling of 55605129 in words is "fifty-five million, six hundred five thousand, one hundred twenty-nine".