81008052 has 12 divisors (see below), whose sum is σ = 189018816. Its totient is φ = 27002680.

The previous prime is 81008051. The next prime is 81008069. The reversal of 81008052 is 25080018.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81008051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3375324 + ... + 3375347.

It is an arithmetic number, because the mean of its divisors is an integer number (15751568).

Almost surely, 2^81008052 is an apocalyptic number.

It is an amenable number.

81008052 is an abundant number, since it is smaller than the sum of its proper divisors (108010764).

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

81008052 is a wasteful number, since it uses less digits than its factorization.

81008052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6750678 (or 6750676 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 81008052 is about 9000.4473222168. The cubic root of 81008052 is about 432.6892076462.

The spelling of 81008052 in words is "eighty-one million, eight thousand, fifty-two".