242220023 has 4 divisors (see below), whose sum is σ = 242284200. Its totient is φ = 242155848.

The previous prime is 242219993. The next prime is 242220031. The reversal of 242220023 is 320022242.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242220023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242219983 and 242220010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242222023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26048 + ... + 34101.

It is an arithmetic number, because the mean of its divisors is an integer number (60571050).

Almost surely, 2^242220023 is an apocalyptic number.

242220023 is a deficient number, since it is larger than the sum of its proper divisors (64177).

242220023 is an equidigital number, since it uses as much as digits as its factorization.

242220023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64176.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 242220023 is about 15563.4193864973. The cubic root of 242220023 is about 623.3567697506.

Adding to 242220023 its reverse (320022242), we get a palindrome (562242265).

The spelling of 242220023 in words is "two hundred forty-two million, two hundred twenty thousand, twenty-three".