81522914 has 16 divisors (see below), whose sum is σ = 137007936. Its totient is φ = 36054000.

The previous prime is 81522911. The next prime is 81522923. The reversal of 81522914 is 41922518.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (81522911) 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, 49262 + ... + 50889.

It is an arithmetic number, because the mean of its divisors is an integer number (8562996).

Almost surely, 2^81522914 is an apocalyptic number.

81522914 is a deficient number, since it is larger than the sum of its proper divisors (55485022).

81522914 is a wasteful number, since it uses less digits than its factorization.

81522914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100201.

The product of its digits is 5760, while the sum is 32.

The square root of 81522914 is about 9029.0040425287. The cubic root of 81522914 is about 433.6039518040.

The spelling of 81522914 in words is "eighty-one million, five hundred twenty-two thousand, nine hundred fourteen".