81293162 has 16 divisors (see below), whose sum is σ = 123594432. Its totient is φ = 40098240.

The previous prime is 81293161. The next prime is 81293237. The reversal of 81293162 is 26139218.

It is not an unprimeable number, because it can be changed into a prime (81293161) 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, 68837 + ... + 70007.

It is an arithmetic number, because the mean of its divisors is an integer number (7724652).

Almost surely, 2^81293162 is an apocalyptic number.

81293162 is a deficient number, since it is larger than the sum of its proper divisors (42301270).

81293162 is a wasteful number, since it uses less digits than its factorization.

81293162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1613.

The product of its digits is 5184, while the sum is 32.

The square root of 81293162 is about 9016.2720677673. The cubic root of 81293162 is about 433.1962336830.

The spelling of 81293162 in words is "eighty-one million, two hundred ninety-three thousand, one hundred sixty-two".