220402401 has 4 divisors (see below), whose sum is σ = 293869872. Its totient is φ = 146934932.

The previous prime is 220402397. The next prime is 220402421. The reversal of 220402401 is 104204022.

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 220402401 - 2² = 220402397 is a prime.

It is not an unprimeable number, because it can be changed into a prime (220402421) 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, 36733731 + ... + 36733736.

It is an arithmetic number, because the mean of its divisors is an integer number (73467468).

Almost surely, 2^220402401 is an apocalyptic number.

It is an amenable number.

220402401 is a deficient number, since it is larger than the sum of its proper divisors (73467471).

220402401 is an equidigital number, since it uses as much as digits as its factorization.

220402401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73467470.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 220402401 is about 14845.9557119102. The cubic root of 220402401 is about 604.0489129358.

Adding to 220402401 its reverse (104204022), we get a palindrome (324606423).

The spelling of 220402401 in words is "two hundred twenty million, four hundred two thousand, four hundred one".