81003192 has 32 divisors (see below), whose sum is σ = 202986000. Its totient is φ = 26937344.

The previous prime is 81003187. The next prime is 81003229. The reversal of 81003192 is 29130018.

It is a super-2 number, since 2×81003192² = 13123034228377728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

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, 7018 + ... + 14534.

Almost surely, 2^81003192 is an apocalyptic number.

It is an amenable number.

81003192 is an abundant number, since it is smaller than the sum of its proper divisors (121982808).

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

81003192 is a wasteful number, since it uses less digits than its factorization.

81003192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7975 (or 7971 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 81003192 is about 9000.1773315863. The cubic root of 81003192 is about 432.6805545492.

The spelling of 81003192 in words is "eighty-one million, three thousand, one hundred ninety-two".