81599352 has 16 divisors (see below), whose sum is σ = 203998440. Its totient is φ = 27199776.

The previous prime is 81599351. The next prime is 81599369. The reversal of 81599352 is 25399518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81599351) 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, 1699963 + ... + 1700010.

Almost surely, 2^81599352 is an apocalyptic number.

It is an amenable number.

81599352 is an abundant number, since it is smaller than the sum of its proper divisors (122399088).

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

81599352 is a wasteful number, since it uses less digits than its factorization.

81599352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3399982 (or 3399978 counting only the distinct ones).

The product of its digits is 97200, while the sum is 42.

The square root of 81599352 is about 9033.2359650349. The cubic root of 81599352 is about 433.7394289102.

The spelling of 81599352 in words is "eighty-one million, five hundred ninety-nine thousand, three hundred fifty-two".