221033401 has 8 divisors (see below), whose sum is σ = 222317024. Its totient is φ = 219754080.

The previous prime is 221033377. The next prime is 221033429. The reversal of 221033401 is 104330122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221033401 - 2²³ = 212644793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221033801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170566 + ... + 171856.

It is an arithmetic number, because the mean of its divisors is an integer number (27789628).

Almost surely, 2^221033401 is an apocalyptic number.

It is an amenable number.

221033401 is a deficient number, since it is larger than the sum of its proper divisors (1283623).

221033401 is a wasteful number, since it uses less digits than its factorization.

221033401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 221033401 is about 14867.1921020750. The cubic root of 221033401 is about 604.6248166736.

Adding to 221033401 its reverse (104330122), we get a palindrome (325363523).

The spelling of 221033401 in words is "two hundred twenty-one million, thirty-three thousand, four hundred one".