81235086 has 8 divisors (see below), whose sum is σ = 162470184. Its totient is φ = 27078360.

The previous prime is 81235069. The next prime is 81235111. The reversal of 81235086 is 68053218.

It is a happy number.

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

81235086 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6769585 + ... + 6769596.

It is an arithmetic number, because the mean of its divisors is an integer number (20308773).

Almost surely, 2^81235086 is an apocalyptic number.

81235086 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81235086 is a wasteful number, since it uses less digits than its factorization.

81235086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13539186.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 81235086 is about 9013.0508708206. The cubic root of 81235086 is about 433.0930503514.

The spelling of 81235086 in words is "eighty-one million, two hundred thirty-five thousand, eighty-six".