195242590 has 16 divisors (see below), whose sum is σ = 351777888. Its totient is φ = 78021216.

The previous prime is 195242543. The next prime is 195242591. The reversal of 195242590 is 95242591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195242591) 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, 1999 + ... + 19861.

It is an arithmetic number, because the mean of its divisors is an integer number (21986118).

Almost surely, 2^195242590 is an apocalyptic number.

195242590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

195242590 is a deficient number, since it is larger than the sum of its proper divisors (156535298).

195242590 is a wasteful number, since it uses less digits than its factorization.

195242590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18963.

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 195242590 is about 13972.9234593195. The cubic root of 195242590 is about 580.1293706657.

Subtracting from 195242590 its reverse (95242591), we obtain a palindrome (99999999).

The spelling of 195242590 in words is "one hundred ninety-five million, two hundred forty-two thousand, five hundred ninety".