220857325809 has 4 divisors (see below), whose sum is σ = 294476434416. Its totient is φ = 147238217204.

The previous prime is 220857325807. The next prime is 220857325841. The reversal of 220857325809 is 908523758022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220857325809 - 2¹ = 220857325807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220857325807) 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, 36809554299 + ... + 36809554304.

It is an arithmetic number, because the mean of its divisors is an integer number (73619108604).

Almost surely, 2^220857325809 is an apocalyptic number.

It is an amenable number.

220857325809 is a deficient number, since it is larger than the sum of its proper divisors (73619108607).

220857325809 is an equidigital number, since it uses as much as digits as its factorization.

220857325809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73619108606.

The product of its (nonzero) digits is 2419200, while the sum is 51.

The spelling of 220857325809 in words is "two hundred twenty billion, eight hundred fifty-seven million, three hundred twenty-five thousand, eight hundred nine".