81522734 has 8 divisors (see below), whose sum is σ = 122387760. Its totient is φ = 40726816.

The previous prime is 81522733. The next prime is 81522751. The reversal of 81522734 is 43722518.

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

It is a self number, because there is not a number n which added to its sum of digits gives 81522734.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81522731) 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, 14219 + ... + 19110.

It is an arithmetic number, because the mean of its divisors is an integer number (15298470).

Almost surely, 2^81522734 is an apocalyptic number.

81522734 is a deficient number, since it is larger than the sum of its proper divisors (40865026).

81522734 is a wasteful number, since it uses less digits than its factorization.

81522734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34554.

The product of its digits is 13440, while the sum is 32.

The square root of 81522734 is about 9028.9940746464. The cubic root of 81522734 is about 433.6036326759.

The spelling of 81522734 in words is "eighty-one million, five hundred twenty-two thousand, seven hundred thirty-four".