221413412 has 24 divisors (see below), whose sum is σ = 426892032. Its totient is φ = 99644000.

The previous prime is 221413391. The next prime is 221413417. The reversal of 221413412 is 214314122.

It is not an unprimeable number, because it can be changed into a prime (221413417) 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, 20468 + ... + 29355.

It is an arithmetic number, because the mean of its divisors is an integer number (17787168).

Almost surely, 2^221413412 is an apocalyptic number.

221413412 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221413412 is a deficient number, since it is larger than the sum of its proper divisors (205478620).

221413412 is a wasteful number, since it uses less digits than its factorization.

221413412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49939 (or 49937 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 221413412 is about 14879.9668010382. The cubic root of 221413412 is about 604.9711180803.

Adding to 221413412 its reverse (214314122), we get a palindrome (435727534).

The spelling of 221413412 in words is "two hundred twenty-one million, four hundred thirteen thousand, four hundred twelve".