551205307 has 4 divisors (see below), whose sum is σ = 551336400. Its totient is φ = 551074216.

The previous prime is 551205293. The next prime is 551205311. The reversal of 551205307 is 703502155.

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 551205307 - 2²³ = 542816699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551205337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59023 + ... + 67720.

It is an arithmetic number, because the mean of its divisors is an integer number (137834100).

Almost surely, 2^551205307 is an apocalyptic number.

551205307 is a deficient number, since it is larger than the sum of its proper divisors (131093).

551205307 is a wasteful number, since it uses less digits than its factorization.

551205307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131092.

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 551205307 is about 23477.7619674449. The cubic root of 551205307 is about 819.9193391807.

The spelling of 551205307 in words is "five hundred fifty-one million, two hundred five thousand, three hundred seven".