85511711 has 2 divisors, whose sum is σ = 85511712. Its totient is φ = 85511710.

The previous prime is 85511707. The next prime is 85511731. The reversal of 85511711 is 11711558.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85511711 - 2² = 85511707 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85511731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42755855 + 42755856.

It is an arithmetic number, because the mean of its divisors is an integer number (42755856).

Almost surely, 2^85511711 is an apocalyptic number.

85511711 is a deficient number, since it is larger than the sum of its proper divisors (1).

85511711 is an equidigital number, since it uses as much as digits as its factorization.

85511711 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1400, while the sum is 29.

The square root of 85511711 is about 9247.2542411248. The cubic root of 85511711 is about 440.5635186823.

The spelling of 85511711 in words is "eighty-five million, five hundred eleven thousand, seven hundred eleven".