81282052 has 12 divisors (see below), whose sum is σ = 142306780. Its totient is φ = 40622976.

The previous prime is 81282037. The next prime is 81282079. The reversal of 81282052 is 25028218.

It can be written as a sum of positive squares in 2 ways, for example, as 17505856 + 63776196 = 4184^2 + 7986^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 81282052.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14824 + ... + 19552.

Almost surely, 2^81282052 is an apocalyptic number.

It is an amenable number.

81282052 is a deficient number, since it is larger than the sum of its proper divisors (61024728).

81282052 is a wasteful number, since it uses less digits than its factorization.

81282052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9030 (or 9028 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 81282052 is about 9015.6559384218. The cubic root of 81282052 is about 433.1764984052.

The spelling of 81282052 in words is "eighty-one million, two hundred eighty-two thousand, fifty-two".