68219256231 has 72 divisors (see below), whose sum is σ = 116252585280. Its totient is φ = 38431096704.

The previous prime is 68219256229. The next prime is 68219256251. The reversal of 68219256231 is 13265291286.

68219256231 is a `hidden beast` number, since 6 + 8 + 2 + 19 + 2 + 5 + 623 + 1 = 666.

It is not a de Polignac number, because 68219256231 - 2¹ = 68219256229 is a prime.

It is a super-2 number, since 2×68219256231² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68219256251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 35290941 + ... + 35292873.

It is an arithmetic number, because the mean of its divisors is an integer number (1614619240).

Almost surely, 2^68219256231 is an apocalyptic number.

68219256231 is a deficient number, since it is larger than the sum of its proper divisors (48033329049).

68219256231 is a wasteful number, since it uses less digits than its factorization.

68219256231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3045 (or 3035 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The spelling of 68219256231 in words is "sixty-eight billion, two hundred nineteen million, two hundred fifty-six thousand, two hundred thirty-one".