81962122 has 8 divisors (see below), whose sum is σ = 134119872. Its totient is φ = 37255500.

The previous prime is 81962119. The next prime is 81962123. The reversal of 81962122 is 22126918.

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

It is not an unprimeable number, because it can be changed into a prime (81962123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1862754 + ... + 1862797.

It is an arithmetic number, because the mean of its divisors is an integer number (16764984).

Almost surely, 2^81962122 is an apocalyptic number.

81962122 is a deficient number, since it is larger than the sum of its proper divisors (52157750).

81962122 is a wasteful number, since it uses less digits than its factorization.

81962122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3725564.

The product of its digits is 3456, while the sum is 31.

The square root of 81962122 is about 9053.2934338836. The cubic root of 81962122 is about 434.3812438555.

The spelling of 81962122 in words is "eighty-one million, nine hundred sixty-two thousand, one hundred twenty-two".