221401074 has 8 divisors (see below), whose sum is σ = 442802160. Its totient is φ = 73800356.

The previous prime is 221401073. The next prime is 221401079. The reversal of 221401074 is 470104122.

It is a happy number.

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

221401074 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 221401074.

It is not an unprimeable number, because it can be changed into a prime (221401073) 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, 18450084 + ... + 18450095.

It is an arithmetic number, because the mean of its divisors is an integer number (55350270).

Almost surely, 2^221401074 is an apocalyptic number.

221401074 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221401074 is a wasteful number, since it uses less digits than its factorization.

221401074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36900184.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 221401074 is about 14879.5522110042. The cubic root of 221401074 is about 604.9598807720.

Adding to 221401074 its reverse (470104122), we get a palindrome (691505196).

The spelling of 221401074 in words is "two hundred twenty-one million, four hundred one thousand, seventy-four".