80881111 has 2 divisors, whose sum is σ = 80881112. Its totient is φ = 80881110.

The previous prime is 80881079. The next prime is 80881147. The reversal of 80881111 is 11118808.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 80881111 - 2⁵ = 80881079 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80881111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80881211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40440555 + 40440556.

It is an arithmetic number, because the mean of its divisors is an integer number (40440556).

Almost surely, 2^80881111 is an apocalyptic number.

80881111 is a deficient number, since it is larger than the sum of its proper divisors (1).

80881111 is an equidigital number, since it uses as much as digits as its factorization.

80881111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 28.

The square root of 80881111 is about 8993.3926301480. The cubic root of 80881111 is about 432.4630790317.

Adding to 80881111 its reverse (11118808), we get a palindrome (91999919).

The spelling of 80881111 in words is "eighty million, eight hundred eighty-one thousand, one hundred eleven".