81083152 has 20 divisors (see below), whose sum is σ = 159675916. Its totient is φ = 39876480.

The previous prime is 81083137. The next prime is 81083153. The reversal of 81083152 is 25138018.

It can be written as a sum of positive squares in 2 ways, for example, as 17338896 + 63744256 = 4164^2 + 7984^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 81083152.

It is not an unprimeable number, because it can be changed into a prime (81083153) 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, 40563 + ... + 42514.

Almost surely, 2^81083152 is an apocalyptic number.

It is an amenable number.

81083152 is a deficient number, since it is larger than the sum of its proper divisors (78592764).

81083152 is a wasteful number, since it uses less digits than its factorization.

81083152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83146 (or 83140 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 28.

The square root of 81083152 is about 9004.6183705918. The cubic root of 81083152 is about 432.8228771691.

The spelling of 81083152 in words is "eighty-one million, eighty-three thousand, one hundred fifty-two".