68415281 has 8 divisors (see below), whose sum is σ = 75224064. Its totient is φ = 61704720.

The previous prime is 68415253. The next prime is 68415289. The reversal of 68415281 is 18251486.

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

It is not a de Polignac number, because 68415281 - 2¹⁰ = 68414257 is a prime.

It is a super-2 number, since 2×68415281² = 9361301348617922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68415289) 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, 23090 + ... + 25883.

It is an arithmetic number, because the mean of its divisors is an integer number (9403008).

Almost surely, 2^68415281 is an apocalyptic number.

It is an amenable number.

68415281 is a deficient number, since it is larger than the sum of its proper divisors (6808783).

68415281 is a wasteful number, since it uses less digits than its factorization.

68415281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49111.

The product of its digits is 15360, while the sum is 35.

The square root of 68415281 is about 8271.3530332105. The cubic root of 68415281 is about 408.9947233813.

The spelling of 68415281 in words is "sixty-eight million, four hundred fifteen thousand, two hundred eighty-one".