221423104 has 40 divisors (see below), whose sum is σ = 505623888. Its totient is φ = 94894080.

The previous prime is 221423101. The next prime is 221423123. The reversal of 221423104 is 401324122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221423101) 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, 27307 + ... + 34474.

Almost surely, 2^221423104 is an apocalyptic number.

It is an amenable number.

221423104 is an abundant number, since it is smaller than the sum of its proper divisors (284200784).

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

221423104 is an frugal number, since it uses more digits than its factorization.

221423104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61806 (or 61790 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 221423104 is about 14880.2924702440. The cubic root of 221423104 is about 604.9799451495.

Adding to 221423104 its reverse (401324122), we get a palindrome (622747226).

The spelling of 221423104 in words is "two hundred twenty-one million, four hundred twenty-three thousand, one hundred four".