85537511 has 2 divisors, whose sum is σ = 85537512. Its totient is φ = 85537510.

The previous prime is 85537471. The next prime is 85537519. The reversal of 85537511 is 11573558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85537511 - 2¹⁰ = 85536487 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85537519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42768755 + 42768756.

It is an arithmetic number, because the mean of its divisors is an integer number (42768756).

Almost surely, 2^85537511 is an apocalyptic number.

85537511 is a deficient number, since it is larger than the sum of its proper divisors (1).

85537511 is an equidigital number, since it uses as much as digits as its factorization.

85537511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21000, while the sum is 35.

The square root of 85537511 is about 9248.6491446048. The cubic root of 85537511 is about 440.6078221494.

The spelling of 85537511 in words is "eighty-five million, five hundred thirty-seven thousand, five hundred eleven".