242220413 has 4 divisors (see below), whose sum is σ = 242310720. Its totient is φ = 242130108.

The previous prime is 242220409. The next prime is 242220421. The reversal of 242220413 is 314022242.

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 242220413 - 2² = 242220409 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242220313) 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, 41003 + ... + 46536.

It is an arithmetic number, because the mean of its divisors is an integer number (60577680).

Almost surely, 2^242220413 is an apocalyptic number.

It is an amenable number.

242220413 is a deficient number, since it is larger than the sum of its proper divisors (90307).

242220413 is an equidigital number, since it uses as much as digits as its factorization.

242220413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90306.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 242220413 is about 15563.4319158725. The cubic root of 242220413 is about 623.3571043073.

Adding to 242220413 its reverse (314022242), we get a palindrome (556242655).

The spelling of 242220413 in words is "two hundred forty-two million, two hundred twenty thousand, four hundred thirteen".