81148852 has 12 divisors (see below), whose sum is σ = 142293060. Its totient is φ = 40493696.

The previous prime is 81148819. The next prime is 81148861. The reversal of 81148852 is 25884118.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 73891216 + 7257636 = 8596^2 + 2694^2 .

It is a congruent number.

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, 17893 + ... + 21964.

It is an arithmetic number, because the mean of its divisors is an integer number (11857755).

Almost surely, 2^81148852 is an apocalyptic number.

It is an amenable number.

81148852 is a deficient number, since it is larger than the sum of its proper divisors (61144208).

81148852 is a wasteful number, since it uses less digits than its factorization.

81148852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40370 (or 40368 counting only the distinct ones).

The product of its digits is 20480, while the sum is 37.

The square root of 81148852 is about 9008.2657598452. The cubic root of 81148852 is about 432.9397480821.

The spelling of 81148852 in words is "eighty-one million, one hundred forty-eight thousand, eight hundred fifty-two".