68216883131 has 4 divisors (see below), whose sum is σ = 68457932472. Its totient is φ = 67975833792.

The previous prime is 68216883121. The next prime is 68216883139. The reversal of 68216883131 is 13138861286.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13138861286 = 2 ⋅6569430643.

It is a cyclic number.

It is not a de Polignac number, because 68216883131 - 2⁶ = 68216883067 is a prime.

It is a super-2 number, since 2×68216883131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68216883139) 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, 120524246 + ... + 120524811.

It is an arithmetic number, because the mean of its divisors is an integer number (17114483118).

Almost surely, 2^68216883131 is an apocalyptic number.

68216883131 is a deficient number, since it is larger than the sum of its proper divisors (241049341).

68216883131 is a wasteful number, since it uses less digits than its factorization.

68216883131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241049340.

The product of its digits is 331776, while the sum is 47.

The spelling of 68216883131 in words is "sixty-eight billion, two hundred sixteen million, eight hundred eighty-three thousand, one hundred thirty-one".