81627232 has 24 divisors (see below), whose sum is σ = 160908552. Its totient is φ = 40761600.

The previous prime is 81627181. The next prime is 81627241. The reversal of 81627232 is 23272618.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 81627194 and 81627203.

It is a congruent number.

It is an unprimeable number.

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, 41307 + ... + 43237.

It is an arithmetic number, because the mean of its divisors is an integer number (6704523).

Almost surely, 2^81627232 is an apocalyptic number.

It is an amenable number.

81627232 is a deficient number, since it is larger than the sum of its proper divisors (79281320).

81627232 is a wasteful number, since it uses less digits than its factorization.

81627232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3262 (or 3254 counting only the distinct ones).

The product of its digits is 8064, while the sum is 31.

The square root of 81627232 is about 9034.7790233077. The cubic root of 81627232 is about 433.7888217792.

The spelling of 81627232 in words is "eighty-one million, six hundred twenty-seven thousand, two hundred thirty-two".