81083000 has 32 divisors (see below), whose sum is σ = 189736560. Its totient is φ = 32432800.

The previous prime is 81082999. The next prime is 81083003. The reversal of 81083000 is 38018.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81083003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39542 + ... + 41541.

Almost surely, 2^81083000 is an apocalyptic number.

It is an amenable number.

81083000 is an abundant number, since it is smaller than the sum of its proper divisors (108653560).

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

81083000 is a wasteful number, since it uses less digits than its factorization.

81083000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81104 (or 81090 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 81083000 is about 9004.6099304745. The cubic root of 81083000 is about 432.8226067097.

The spelling of 81083000 in words is "eighty-one million, eighty-three thousand".