63221712 has 20 divisors (see below), whose sum is σ = 163322880. Its totient is φ = 21073888.

The previous prime is 63221701. The next prime is 63221731. The reversal of 63221712 is 21712236.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 658512 + ... + 658607.

It is an arithmetic number, because the mean of its divisors is an integer number (8166144).

Almost surely, 2^63221712 is an apocalyptic number.

It is an amenable number.

63221712 is an abundant number, since it is smaller than the sum of its proper divisors (100101168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63221712 is a wasteful number, since it uses less digits than its factorization.

63221712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317130 (or 1317124 counting only the distinct ones).

The product of its digits is 1008, while the sum is 24.

The square root of 63221712 is about 7951.2082100773. The cubic root of 63221712 is about 398.3719492839.

Adding to 63221712 its reverse (21712236), we get a palindrome (84933948).

The spelling of 63221712 in words is "sixty-three million, two hundred twenty-one thousand, seven hundred twelve".