81152352 has 72 divisors (see below), whose sum is σ = 236179944. Its totient is φ = 26417664.

The previous prime is 81152329. The next prime is 81152371. The reversal of 81152352 is 25325118.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-3 number, since 3×81152352³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9108 + ... + 15660.

It is an arithmetic number, because the mean of its divisors is an integer number (3280277).

Almost surely, 2^81152352 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81152352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118089972).

81152352 is an abundant number, since it is smaller than the sum of its proper divisors (155027592).

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

81152352 is a wasteful number, since it uses less digits than its factorization.

81152352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6612 (or 6601 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 81152352 is about 9008.4600237776. The cubic root of 81152352 is about 432.9459723120.

The spelling of 81152352 in words is "eighty-one million, one hundred fifty-two thousand, three hundred fifty-two".