81803052 has 36 divisors (see below), whose sum is σ = 207095616. Its totient is φ = 27226080.

The previous prime is 81803039. The next prime is 81803053. The reversal of 81803052 is 25030818.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (81803053) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30277 + ... + 32867.

It is an arithmetic number, because the mean of its divisors is an integer number (5752656).

Almost surely, 2^81803052 is an apocalyptic number.

It is an amenable number.

81803052 is an abundant number, since it is smaller than the sum of its proper divisors (125292564).

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

81803052 is a wasteful number, since it uses less digits than its factorization.

81803052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3478 (or 3473 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 81803052 is about 9044.5039664981. The cubic root of 81803052 is about 434.1000498454.

The spelling of 81803052 in words is "eighty-one million, eight hundred three thousand, fifty-two".