80781281 has 8 divisors (see below), whose sum is σ = 93027264. Its totient is φ = 68711760.

The previous prime is 80781247. The next prime is 80781287. The reversal of 80781281 is 18218708.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80781281 is a prime.

It is a super-2 number, since 2×80781281² = 13051230720001922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (80781287) 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, 43130 + ... + 44963.

It is an arithmetic number, because the mean of its divisors is an integer number (11628408).

Almost surely, 2^80781281 is an apocalyptic number.

It is an amenable number.

80781281 is a deficient number, since it is larger than the sum of its proper divisors (12245983).

80781281 is a wasteful number, since it uses less digits than its factorization.

80781281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88231.

The product of its (nonzero) digits is 7168, while the sum is 35.

The square root of 80781281 is about 8987.8407306761. The cubic root of 80781281 is about 432.2850788234.

Adding to 80781281 its reverse (18218708), we get a palindrome (98999989).

The spelling of 80781281 in words is "eighty million, seven hundred eighty-one thousand, two hundred eighty-one".