220242331 has 4 divisors (see below), whose sum is σ = 220315000. Its totient is φ = 220169664.

The previous prime is 220242307. The next prime is 220242343. The reversal of 220242331 is 133242022.

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 220242331 - 2⁵ = 220242299 is a prime.

It is a super-2 number, since 2×220242331² = 97013368728627122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220242299 and 220242308.

It is not an unprimeable number, because it can be changed into a prime (220242301) 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, 31581 + ... + 37918.

It is an arithmetic number, because the mean of its divisors is an integer number (55078750).

Almost surely, 2^220242331 is an apocalyptic number.

220242331 is a deficient number, since it is larger than the sum of its proper divisors (72669).

220242331 is an equidigital number, since it uses as much as digits as its factorization.

220242331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72668.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 220242331 is about 14840.5637022318. The cubic root of 220242331 is about 603.9026448280.

Adding to 220242331 its reverse (133242022), we get a palindrome (353484353).

The spelling of 220242331 in words is "two hundred twenty million, two hundred forty-two thousand, three hundred thirty-one".