81042248 has 32 divisors (see below), whose sum is σ = 181215360. Its totient is φ = 33221760.

The previous prime is 81042209. The next prime is 81042253. The reversal of 81042248 is 84224018.

It is a self number, because there is not a number n which added to its sum of digits gives 81042248.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30173 + ... + 32748.

It is an arithmetic number, because the mean of its divisors is an integer number (5662980).

Almost surely, 2^81042248 is an apocalyptic number.

It is an amenable number.

81042248 is an abundant number, since it is smaller than the sum of its proper divisors (100173112).

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

81042248 is a wasteful number, since it uses less digits than its factorization.

81042248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62957 (or 62953 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 29.

The square root of 81042248 is about 9002.3468051392. The cubic root of 81042248 is about 432.7500829061.

The spelling of 81042248 in words is "eighty-one million, forty-two thousand, two hundred forty-eight".