181281368 has 16 divisors (see below), whose sum is σ = 340578000. Its totient is φ = 90460576.

The previous prime is 181281343. The next prime is 181281371. The reversal of 181281368 is 863182181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18188 + ... + 26331.

It is an arithmetic number, because the mean of its divisors is an integer number (21286125).

Almost surely, 2^181281368 is an apocalyptic number.

It is an amenable number.

181281368 is a deficient number, since it is larger than the sum of its proper divisors (159296632).

181281368 is a wasteful number, since it uses less digits than its factorization.

181281368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45034 (or 45030 counting only the distinct ones).

The product of its digits is 18432, while the sum is 38.

The square root of 181281368 is about 13464.0769457100. The cubic root of 181281368 is about 565.9582433703.

The spelling of 181281368 in words is "one hundred eighty-one million, two hundred eighty-one thousand, three hundred sixty-eight".