81533022 has 16 divisors (see below), whose sum is σ = 170156160. Its totient is φ = 25995992.

The previous prime is 81533017. The next prime is 81533029. The reversal of 81533022 is 22033518.

It is a junction number, because it is equal to n+sod(n) for n = 81532983 and 81533001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81533029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295272 + ... + 295547.

It is an arithmetic number, because the mean of its divisors is an integer number (10634760).

Almost surely, 2^81533022 is an apocalyptic number.

81533022 is an abundant number, since it is smaller than the sum of its proper divisors (88623138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81533022 is a wasteful number, since it uses less digits than its factorization.

81533022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590847.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 81533022 is about 9029.5637768388. The cubic root of 81533022 is about 433.6218718684.

It can be divided in two parts, 8153 and 3022, that added together give a triangular number (11175 = T₁₄₉).

The spelling of 81533022 in words is "eighty-one million, five hundred thirty-three thousand, twenty-two".