855223742273 has 4 divisors (see below), whose sum is σ = 855230509140. Its totient is φ = 855216975408.

The previous prime is 855223742189. The next prime is 855223742281. The reversal of 855223742273 is 372247322558.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 109232233009 + 745991509264 = 330503^2 + 863708^2 .

It is a cyclic number.

It is not a de Polignac number, because 855223742273 - 2²⁴ = 855206965057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855223742293) 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, 3190178 + ... + 3447851.

It is an arithmetic number, because the mean of its divisors is an integer number (213807627285).

Almost surely, 2^855223742273 is an apocalyptic number.

It is an amenable number.

855223742273 is a deficient number, since it is larger than the sum of its proper divisors (6766867).

855223742273 is a wasteful number, since it uses less digits than its factorization.

855223742273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6766866.

The product of its digits is 5644800, while the sum is 50.

The spelling of 855223742273 in words is "eight hundred fifty-five billion, two hundred twenty-three million, seven hundred forty-two thousand, two hundred seventy-three".