68220512 has 24 divisors (see below), whose sum is σ = 134496936. Its totient is φ = 34062592.

The previous prime is 68220511. The next prime is 68220521. The reversal of 68220512 is 21502286.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68220511) 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, 37283 + ... + 39069.

It is an arithmetic number, because the mean of its divisors is an integer number (5604039).

Almost surely, 2^68220512 is an apocalyptic number.

It is an amenable number.

68220512 is a deficient number, since it is larger than the sum of its proper divisors (66276424).

68220512 is a wasteful number, since it uses less digits than its factorization.

68220512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2990 (or 2982 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 68220512 is about 8259.5709331660. The cubic root of 68220512 is about 408.6062370415.

Adding to 68220512 its reverse (21502286), we get a palindrome (89722798).

The spelling of 68220512 in words is "sixty-eight million, two hundred twenty thousand, five hundred twelve".