68808531 has 16 divisors (see below), whose sum is σ = 101582208. Its totient is φ = 41078400.

The previous prime is 68808529. The next prime is 68808541. The reversal of 68808531 is 13580886.

It is a happy number.

It is not a de Polignac number, because 68808531 - 2¹ = 68808529 is a prime.

It is a super-2 number, since 2×68808531² = 9469227876755922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 68808531.

It is not an unprimeable number, because it can be changed into a prime (68808521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13350 + ... + 17771.

It is an arithmetic number, because the mean of its divisors is an integer number (6348888).

Almost surely, 2^68808531 is an apocalyptic number.

68808531 is a deficient number, since it is larger than the sum of its proper divisors (32773677).

68808531 is a wasteful number, since it uses less digits than its factorization.

68808531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31202.

The product of its (nonzero) digits is 46080, while the sum is 39.

The square root of 68808531 is about 8295.0907770801. The cubic root of 68808531 is about 409.7768585501.

The spelling of 68808531 in words is "sixty-eight million, eight hundred eight thousand, five hundred thirty-one".