221225410 has 16 divisors (see below), whose sum is σ = 455092416. Its totient is φ = 75848688.

The previous prime is 221225377. The next prime is 221225423. The reversal of 221225410 is 14522122.

221225410 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1580112 + ... + 1580251.

It is an arithmetic number, because the mean of its divisors is an integer number (28443276).

Almost surely, 2^221225410 is an apocalyptic number.

221225410 is an abundant number, since it is smaller than the sum of its proper divisors (233867006).

221225410 is a wasteful number, since it uses less digits than its factorization.

221225410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3160377.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 221225410 is about 14873.6481738678. The cubic root of 221225410 is about 604.7998427191.

Adding to 221225410 its reverse (14522122), we get a palindrome (235747532).

The spelling of 221225410 in words is "two hundred twenty-one million, two hundred twenty-five thousand, four hundred ten".