55345207 has 4 divisors (see below), whose sum is σ = 55560816. Its totient is φ = 55129600.

The previous prime is 55345187. The next prime is 55345211. The reversal of 55345207 is 70254355.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55345207 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55345237) 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, 107419 + ... + 107932.

It is an arithmetic number, because the mean of its divisors is an integer number (13890204).

Almost surely, 2^55345207 is an apocalyptic number.

55345207 is a deficient number, since it is larger than the sum of its proper divisors (215609).

55345207 is a wasteful number, since it uses less digits than its factorization.

55345207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215608.

The product of its (nonzero) digits is 21000, while the sum is 31.

The square root of 55345207 is about 7439.4359329186. The cubic root of 55345207 is about 381.0892271324.

The spelling of 55345207 in words is "fifty-five million, three hundred forty-five thousand, two hundred seven".