55457807 has 4 divisors (see below), whose sum is σ = 57869040. Its totient is φ = 53046576.

The previous prime is 55457777. The next prime is 55457813. The reversal of 55457807 is 70875455.

55457807 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.

It is a cyclic number.

It is not a de Polignac number, because 55457807 - 2¹⁰ = 55456783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55457107) 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, 1205582 + ... + 1205627.

It is an arithmetic number, because the mean of its divisors is an integer number (14467260).

Almost surely, 2^55457807 is an apocalyptic number.

55457807 is a deficient number, since it is larger than the sum of its proper divisors (2411233).

55457807 is a wasteful number, since it uses less digits than its factorization.

55457807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2411232.

The product of its (nonzero) digits is 196000, while the sum is 41.

The square root of 55457807 is about 7446.9998657177. Note that the first 3 decimals coincide. The cubic root of 55457807 is about 381.3474944786.

The spelling of 55457807 in words is "fifty-five million, four hundred fifty-seven thousand, eight hundred seven".