81083111 has 2 divisors, whose sum is σ = 81083112. Its totient is φ = 81083110.

The previous prime is 81083083. The next prime is 81083137. The reversal of 81083111 is 11138018.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 81083111 - 2¹⁰ = 81082087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (81083411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40541555 + 40541556.

It is an arithmetic number, because the mean of its divisors is an integer number (40541556).

Almost surely, 2^81083111 is an apocalyptic number.

81083111 is a deficient number, since it is larger than the sum of its proper divisors (1).

81083111 is an equidigital number, since it uses as much as digits as its factorization.

81083111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 23.

The square root of 81083111 is about 9004.6160939820. The cubic root of 81083111 is about 432.8228042163.

The spelling of 81083111 in words is "eighty-one million, eighty-three thousand, one hundred eleven".