81250043 has 8 divisors (see below), whose sum is σ = 92951040. Its totient is φ = 69572520.

The previous prime is 81250033. The next prime is 81250049. The reversal of 81250043 is 34005218.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 81250043 - 2⁴ = 81250027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (81250049) 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, 2318 + ... + 12956.

It is an arithmetic number, because the mean of its divisors is an integer number (11618880).

Almost surely, 2^81250043 is an apocalyptic number.

81250043 is a deficient number, since it is larger than the sum of its proper divisors (11700997).

81250043 is a wasteful number, since it uses less digits than its factorization.

81250043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11737.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 81250043 is about 9013.8805738705. The cubic root of 81250043 is about 433.1196290772.

The spelling of 81250043 in words is "eighty-one million, two hundred fifty thousand, forty-three".