55257107 has 4 divisors (see below), whose sum is σ = 56542200. Its totient is φ = 53972016.

The previous prime is 55257079. The next prime is 55257133. The reversal of 55257107 is 70175255.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55257107 - 2¹⁸ = 54994963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55257907) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 642482 + ... + 642567.

It is an arithmetic number, because the mean of its divisors is an integer number (14135550).

Almost surely, 2^55257107 is an apocalyptic number.

55257107 is a deficient number, since it is larger than the sum of its proper divisors (1285093).

55257107 is a wasteful number, since it uses less digits than its factorization.

55257107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285092.

The product of its (nonzero) digits is 12250, while the sum is 32.

The square root of 55257107 is about 7433.5124268410. The cubic root of 55257107 is about 380.8869103577.

The spelling of 55257107 in words is "fifty-five million, two hundred fifty-seven thousand, one hundred seven".