63421213 has 4 divisors (see below), whose sum is σ = 64185408. Its totient is φ = 62657020.

The previous prime is 63421201. The next prime is 63421217. The reversal of 63421213 is 31212436.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 63421213 - 2¹⁷ = 63290141 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 (63421217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 381973 + ... + 382138.

It is an arithmetic number, because the mean of its divisors is an integer number (16046352).

Almost surely, 2^63421213 is an apocalyptic number.

It is an amenable number.

63421213 is a deficient number, since it is larger than the sum of its proper divisors (764195).

63421213 is an equidigital number, since it uses as much as digits as its factorization.

63421213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764194.

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

The square root of 63421213 is about 7963.7436548397. The cubic root of 63421213 is about 398.7905404548.

Adding to 63421213 its reverse (31212436), we get a palindrome (94633649).

The spelling of 63421213 in words is "sixty-three million, four hundred twenty-one thousand, two hundred thirteen".