81502032 has 20 divisors (see below), whose sum is σ = 210547040. Its totient is φ = 27167328.

The previous prime is 81502027. The next prime is 81502033. The reversal of 81502032 is 23020518.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81502033) 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, 848932 + ... + 849027.

It is an arithmetic number, because the mean of its divisors is an integer number (10527352).

Almost surely, 2^81502032 is an apocalyptic number.

It is an amenable number.

81502032 is an abundant number, since it is smaller than the sum of its proper divisors (129045008).

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

81502032 is a wasteful number, since it uses less digits than its factorization.

81502032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697970 (or 1697964 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 81502032 is about 9027.8475840036. The cubic root of 81502032 is about 433.5669262591.

The spelling of 81502032 in words is "eighty-one million, five hundred two thousand, thirty-two".