81152922 has 8 divisors (see below), whose sum is σ = 162305856. Its totient is φ = 27050972.

The previous prime is 81152893. The next prime is 81152927. The reversal of 81152922 is 22925118.

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

81152922 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 81152922.

It is not an unprimeable number, because it can be changed into a prime (81152927) 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, 6762738 + ... + 6762749.

It is an arithmetic number, because the mean of its divisors is an integer number (20288232).

Almost surely, 2^81152922 is an apocalyptic number.

81152922 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.

81152922 is a wasteful number, since it uses less digits than its factorization.

81152922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13525492.

The product of its digits is 2880, while the sum is 30.

The square root of 81152922 is about 9008.4916606500. The cubic root of 81152922 is about 432.9469859553.

The spelling of 81152922 in words is "eighty-one million, one hundred fifty-two thousand, nine hundred twenty-two".