68355031 has 4 divisors (see below), whose sum is σ = 70560064. Its totient is φ = 66150000.

The previous prime is 68355029. The next prime is 68355041. The reversal of 68355031 is 13055386.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13055386 = 2 ⋅6527693.

It is a cyclic number.

It is not a de Polignac number, because 68355031 - 2¹ = 68355029 is a prime.

It is a super-2 number, since 2×68355031² = 9344820526021922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 2205001 = 68355031 / (6 + 8 + 3 + 5 + 5 + 0 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68354984 and 68355002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68355041) 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, 1102470 + ... + 1102531.

It is an arithmetic number, because the mean of its divisors is an integer number (17640016).

Almost surely, 2^68355031 is an apocalyptic number.

68355031 is a deficient number, since it is larger than the sum of its proper divisors (2205033).

68355031 is a wasteful number, since it uses less digits than its factorization.

68355031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2205032.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 68355031 is about 8267.7101424760. The cubic root of 68355031 is about 408.8746275542.

The spelling of 68355031 in words is "sixty-eight million, three hundred fifty-five thousand, thirty-one".