85557261 has 8 divisors (see below), whose sum is σ = 115123360. Its totient is φ = 56514672.

The previous prime is 85557161. The next prime is 85557271. The reversal of 85557261 is 16275558.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85557261 - 2¹⁵ = 85524493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85557271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130495 + ... + 131148.

It is an arithmetic number, because the mean of its divisors is an integer number (14390420).

Almost surely, 2^85557261 is an apocalyptic number.

It is an amenable number.

85557261 is a deficient number, since it is larger than the sum of its proper divisors (29566099).

85557261 is a wasteful number, since it uses less digits than its factorization.

85557261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261755.

The product of its digits is 84000, while the sum is 39.

The square root of 85557261 is about 9249.7168064758. The cubic root of 85557261 is about 440.6417306056.

The spelling of 85557261 in words is "eighty-five million, five hundred fifty-seven thousand, two hundred sixty-one".