221413413 has 16 divisors (see below), whose sum is σ = 318862656. Its totient is φ = 135853440.

The previous prime is 221413391. The next prime is 221413417. The reversal of 221413413 is 314314122.

It is not a de Polignac number, because 221413413 - 2¹² = 221409317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221413413.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 5353 + ... + 21713.

It is an arithmetic number, because the mean of its divisors is an integer number (19928916).

Almost surely, 2^221413413 is an apocalyptic number.

It is an amenable number.

221413413 is a deficient number, since it is larger than the sum of its proper divisors (97449243).

221413413 is a wasteful number, since it uses less digits than its factorization.

221413413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16724.

The product of its digits is 576, while the sum is 21.

The square root of 221413413 is about 14879.9668346405. The cubic root of 221413413 is about 604.9711189911.

Adding to 221413413 its reverse (314314122), we get a palindrome (535727535).

The spelling of 221413413 in words is "two hundred twenty-one million, four hundred thirteen thousand, four hundred thirteen".