81250195 has 8 divisors (see below), whose sum is σ = 105000336. Its totient is φ = 60000096.

The previous prime is 81250193. The next prime is 81250229. The reversal of 81250195 is 59105218.

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

It is not a de Polignac number, because 81250195 - 2¹ = 81250193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81250193) 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, 624937 + ... + 625066.

It is an arithmetic number, because the mean of its divisors is an integer number (13125042).

Almost surely, 2^81250195 is an apocalyptic number.

81250195 is a deficient number, since it is larger than the sum of its proper divisors (23750141).

81250195 is a wasteful number, since it uses less digits than its factorization.

81250195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250021.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 81250195 is about 9013.8890053073. The cubic root of 81250195 is about 433.1198991658.

The spelling of 81250195 in words is "eighty-one million, two hundred fifty thousand, one hundred ninety-five".