80218891 has 8 divisors (see below), whose sum is σ = 81432000. Its totient is φ = 79010880.

The previous prime is 80218861. The next prime is 80218921. The reversal of 80218891 is 19881208.

It is an interprime number because it is at equal distance from previous prime (80218861) and next prime (80218921).

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

It is a cyclic number.

It is not a de Polignac number, because 80218891 - 2¹⁵ = 80186123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 80218891.

It is not an unprimeable number, because it can be changed into a prime (80218811) 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, 40185 + ... + 42133.

It is an arithmetic number, because the mean of its divisors is an integer number (10179000).

Almost surely, 2^80218891 is an apocalyptic number.

80218891 is a deficient number, since it is larger than the sum of its proper divisors (1213109).

80218891 is a wasteful number, since it uses less digits than its factorization.

80218891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2549.

The product of its (nonzero) digits is 9216, while the sum is 37.

The square root of 80218891 is about 8956.4999302183. The cubic root of 80218891 is about 431.2795687630.

The spelling of 80218891 in words is "eighty million, two hundred eighteen thousand, eight hundred ninety-one".