85355261 has 4 divisors (see below), whose sum is σ = 85542492. Its totient is φ = 85168032.

The previous prime is 85355233. The next prime is 85355267. The reversal of 85355261 is 16255358.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28955161 + 56400100 = 5381^2 + 7510^2 .

It is a cyclic number.

It is not a de Polignac number, because 85355261 - 2¹⁸ = 85093117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85355267) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92930 + ... + 93843.

It is an arithmetic number, because the mean of its divisors is an integer number (21385623).

Almost surely, 2^85355261 is an apocalyptic number.

It is an amenable number.

85355261 is a deficient number, since it is larger than the sum of its proper divisors (187231).

85355261 is a wasteful number, since it uses less digits than its factorization.

85355261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187230.

The product of its digits is 36000, while the sum is 35.

The square root of 85355261 is about 9238.7911005715. The cubic root of 85355261 is about 440.2946734772.

The spelling of 85355261 in words is "eighty-five million, three hundred fifty-five thousand, two hundred sixty-one".