81162582 has 8 divisors (see below), whose sum is σ = 162325176. Its totient is φ = 27054192.

The previous prime is 81162581. The next prime is 81162611. The reversal of 81162582 is 28526118.

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

81162582 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81162581) 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, 6763543 + ... + 6763554.

It is an arithmetic number, because the mean of its divisors is an integer number (20290647).

Almost surely, 2^81162582 is an apocalyptic number.

81162582 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.

81162582 is a wasteful number, since it uses less digits than its factorization.

81162582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13527102.

The product of its digits is 7680, while the sum is 33.

The square root of 81162582 is about 9009.0278054849. The cubic root of 81162582 is about 432.9641638209.

The spelling of 81162582 in words is "eighty-one million, one hundred sixty-two thousand, five hundred eighty-two".