81150052 has 12 divisors (see below), whose sum is σ = 142121980. Its totient is φ = 40543776.

The previous prime is 81150023. The next prime is 81150107. The reversal of 81150052 is 25005118.

It can be written as a sum of positive squares in 2 ways, for example, as 47114496 + 34035556 = 6864^2 + 5834^2 .

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, 1383 + ... + 12814.

Almost surely, 2^81150052 is an apocalyptic number.

It is an amenable number.

81150052 is a deficient number, since it is larger than the sum of its proper divisors (60971928).

81150052 is a wasteful number, since it uses less digits than its factorization.

81150052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15630 (or 15628 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 81150052 is about 9008.3323650940. The cubic root of 81150052 is about 432.9418821239.

The spelling of 81150052 in words is "eighty-one million, one hundred fifty thousand, fifty-two".