55819307 has 4 divisors (see below), whose sum is σ = 55936320. Its totient is φ = 55702296.

The previous prime is 55819271. The next prime is 55819319. The reversal of 55819307 is 70391855.

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 55819307 - 2¹² = 55815211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55819507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57788 + ... + 58745.

It is an arithmetic number, because the mean of its divisors is an integer number (13984080).

Almost surely, 2^55819307 is an apocalyptic number.

55819307 is a deficient number, since it is larger than the sum of its proper divisors (117013).

55819307 is a wasteful number, since it uses less digits than its factorization.

55819307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117012.

The product of its (nonzero) digits is 37800, while the sum is 38.

The square root of 55819307 is about 7471.2319599916. The cubic root of 55819307 is about 382.1743011846.

The spelling of 55819307 in words is "fifty-five million, eight hundred nineteen thousand, three hundred seven".