81250132 has 12 divisors (see below), whose sum is σ = 146774656. Its totient is φ = 39314520.

The previous prime is 81250073. The next prime is 81250133. The reversal of 81250132 is 23105218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81250133) 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, 327498 + ... + 327745.

Almost surely, 2^81250132 is an apocalyptic number.

It is an amenable number.

81250132 is a deficient number, since it is larger than the sum of its proper divisors (65524524).

81250132 is a wasteful number, since it uses less digits than its factorization.

81250132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655278 (or 655276 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 81250132 is about 9013.8855106996. The cubic root of 81250132 is about 433.1197872212.

The spelling of 81250132 in words is "eighty-one million, two hundred fifty thousand, one hundred thirty-two".