68211731 has 8 divisors (see below), whose sum is σ = 78084864. Its totient is φ = 58370760.

The previous prime is 68211719. The next prime is 68211739. The reversal of 68211731 is 13711286.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 68211731 - 2¹⁰ = 68210707 is a prime.

It is a super-2 number, since 2×68211731² = 9305680492032722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68211694 and 68211703.

It is not an unprimeable number, because it can be changed into a prime (68211739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3305 + ... + 12138.

It is an arithmetic number, because the mean of its divisors is an integer number (9760608).

Almost surely, 2^68211731 is an apocalyptic number.

68211731 is a deficient number, since it is larger than the sum of its proper divisors (9873133).

68211731 is a wasteful number, since it uses less digits than its factorization.

68211731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16081.

The product of its digits is 2016, while the sum is 29.

The square root of 68211731 is about 8259.0393509173. The cubic root of 68211731 is about 408.5887050450.

The spelling of 68211731 in words is "sixty-eight million, two hundred eleven thousand, seven hundred thirty-one".