68213031 has 8 divisors (see below), whose sum is σ = 91275504. Its totient is φ = 45312960.

The previous prime is 68212997. The next prime is 68213039. The reversal of 68213031 is 13031286.

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

It is not a de Polignac number, because 68213031 - 2⁹ = 68212519 is a prime.

It is a super-2 number, since 2×68213031² = 9306035196413922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 68212992 and 68213010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68213039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39616 + ... + 41301.

It is an arithmetic number, because the mean of its divisors is an integer number (11409438).

Almost surely, 2^68213031 is an apocalyptic number.

68213031 is a deficient number, since it is larger than the sum of its proper divisors (23062473).

68213031 is a wasteful number, since it uses less digits than its factorization.

68213031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81201.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 68213031 is about 8259.1180521893. The cubic root of 68213031 is about 408.5913006980.

The spelling of 68213031 in words is "sixty-eight million, two hundred thirteen thousand, thirty-one".