220381097 has 4 divisors (see below), whose sum is σ = 220768980. Its totient is φ = 219993216.

The previous prime is 220381093. The next prime is 220381099. The reversal of 220381097 is 790183022.

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 116014441 + 104366656 = 10771^2 + 10216^2 .

It is a cyclic number.

It is not a de Polignac number, because 220381097 - 2² = 220381093 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220381093) 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, 193088 + ... + 194225.

It is an arithmetic number, because the mean of its divisors is an integer number (55192245).

Almost surely, 2^220381097 is an apocalyptic number.

It is an amenable number.

220381097 is a deficient number, since it is larger than the sum of its proper divisors (387883).

220381097 is an equidigital number, since it uses as much as digits as its factorization.

220381097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387882.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 220381097 is about 14845.2381927674. The cubic root of 220381097 is about 604.0294499405.

The spelling of 220381097 in words is "two hundred twenty million, three hundred eighty-one thousand, ninety-seven".