81524950 has 24 divisors (see below), whose sum is σ = 163302048. Its totient is φ = 30101280.

The previous prime is 81524941. The next prime is 81524977. The reversal of 81524950 is 5942518.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62062 + ... + 63361.

It is an arithmetic number, because the mean of its divisors is an integer number (6804252).

Almost surely, 2^81524950 is an apocalyptic number.

81524950 is an abundant number, since it is smaller than the sum of its proper divisors (81777098).

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

81524950 is a wasteful number, since it uses less digits than its factorization.

81524950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125448 (or 125443 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 81524950 is about 9029.1167895869. The cubic root of 81524950 is about 433.6075614652.

The spelling of 81524950 in words is "eighty-one million, five hundred twenty-four thousand, nine hundred fifty".