63221413 has 4 divisors (see below), whose sum is σ = 63240300. Its totient is φ = 63202528.

The previous prime is 63221407. The next prime is 63221423. The reversal of 63221413 is 31412236.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6640929 + 56580484 = 2577^2 + 7522^2 .

It is a cyclic number.

It is not a de Polignac number, because 63221413 - 2⁵ = 63221381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63221423) 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, 2920 + ... + 11617.

It is an arithmetic number, because the mean of its divisors is an integer number (15810075).

Almost surely, 2^63221413 is an apocalyptic number.

It is an amenable number.

63221413 is a deficient number, since it is larger than the sum of its proper divisors (18887).

63221413 is a wasteful number, since it uses less digits than its factorization.

63221413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18886.

The product of its digits is 864, while the sum is 22.

The square root of 63221413 is about 7951.1894078811. The cubic root of 63221413 is about 398.3713212644.

Adding to 63221413 its reverse (31412236), we get a palindrome (94633649).

The spelling of 63221413 in words is "sixty-three million, two hundred twenty-one thousand, four hundred thirteen".