81093152 has 48 divisors (see below), whose sum is σ = 183661632. Its totient is φ = 34525440.

The previous prime is 81093143. The next prime is 81093161. The reversal of 81093152 is 25139018.

It is an interprime number because it is at equal distance from previous prime (81093143) and next prime (81093161).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35402 + ... + 37622.

It is an arithmetic number, because the mean of its divisors is an integer number (3826284).

Almost surely, 2^81093152 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 81093152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91830816).

81093152 is an abundant number, since it is smaller than the sum of its proper divisors (102568480).

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

81093152 is a wasteful number, since it uses less digits than its factorization.

81093152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2401 (or 2393 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 81093152 is about 9005.1736240897. The cubic root of 81093152 is about 432.8406698126.

The spelling of 81093152 in words is "eighty-one million, ninety-three thousand, one hundred fifty-two".