80001111 has 16 divisors (see below), whose sum is σ = 113909760. Its totient is φ = 49832160.

The previous prime is 80001101. The next prime is 80001139. The reversal of 80001111 is 11110008.

It is a happy number.

It is not a de Polignac number, because 80001111 - 2¹⁰ = 80000087 is a prime.

It is a super-2 number, since 2×80001111² = 12800355522468642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80001101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12135 + ... + 17528.

It is an arithmetic number, because the mean of its divisors is an integer number (7119360).

Almost surely, 2^80001111 is an apocalyptic number.

80001111 is a deficient number, since it is larger than the sum of its proper divisors (33908649).

80001111 is a wasteful number, since it uses less digits than its factorization.

80001111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29726.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 80001111 is about 8944.3340165716. The cubic root of 80001111 is about 430.8889326446. Note that the first 3 decimals are identical.

Adding to 80001111 its reverse (11110008), we get a palindrome (91111119).

The spelling of 80001111 in words is "eighty million, one thousand, one hundred eleven".