81465432 has 32 divisors (see below), whose sum is σ = 206246400. Its totient is φ = 26810784.

The previous prime is 81465431. The next prime is 81465443. The reversal of 81465432 is 23456418.

It is a super-2 number, since 2×81465432² = 13273233221893248, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81465393 and 81465402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81465431) 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 7 ways as a sum of consecutive naturals, for example, 19588 + ... + 23379.

It is an arithmetic number, because the mean of its divisors is an integer number (6445200).

Almost surely, 2^81465432 is an apocalyptic number.

It is an amenable number.

81465432 is an abundant number, since it is smaller than the sum of its proper divisors (124780968).

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

81465432 is a wasteful number, since it uses less digits than its factorization.

81465432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43055 (or 43051 counting only the distinct ones).

The product of its digits is 23040, while the sum is 33.

The square root of 81465432 is about 9025.8202951311. The cubic root of 81465432 is about 433.5020161170.

The spelling of 81465432 in words is "eighty-one million, four hundred sixty-five thousand, four hundred thirty-two".