68245281 has 16 divisors (see below), whose sum is σ = 108881920. Its totient is φ = 41996880.

The previous prime is 68245273. The next prime is 68245297. The reversal of 68245281 is 18254286.

It is not a de Polignac number, because 68245281 - 2³ = 68245273 is a prime.

It is a super-2 number, since 2×68245281² = 9314836757537922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68245201) 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, 96865 + ... + 97566.

It is an arithmetic number, because the mean of its divisors is an integer number (6805120).

Almost surely, 2^68245281 is an apocalyptic number.

It is an amenable number.

68245281 is a deficient number, since it is larger than the sum of its proper divisors (40636639).

68245281 is a wasteful number, since it uses less digits than its factorization.

68245281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194453 (or 194447 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 68245281 is about 8261.0702091194. The cubic root of 68245281 is about 408.6556823035.

The spelling of 68245281 in words is "sixty-eight million, two hundred forty-five thousand, two hundred eighty-one".