81214824 has 16 divisors (see below), whose sum is σ = 203037120. Its totient is φ = 27071600.

The previous prime is 81214813. The next prime is 81214843. The reversal of 81214824 is 42841218.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 81214791 and 81214800.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1691952 + ... + 1691999.

It is an arithmetic number, because the mean of its divisors is an integer number (12689820).

Almost surely, 2^81214824 is an apocalyptic number.

It is an amenable number.

81214824 is an abundant number, since it is smaller than the sum of its proper divisors (121822296).

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

81214824 is a wasteful number, since it uses less digits than its factorization.

81214824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3383960 (or 3383956 counting only the distinct ones).

The product of its digits is 4096, while the sum is 30.

The square root of 81214824 is about 9011.9267640167. The cubic root of 81214824 is about 433.0570393881.

The spelling of 81214824 in words is "eighty-one million, two hundred fourteen thousand, eight hundred twenty-four".