195801520 has 20 divisors (see below), whose sum is σ = 455238720. Its totient is φ = 78320576.

The previous prime is 195801511. The next prime is 195801523. The reversal of 195801520 is 25108591.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (195801523) 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, 1223680 + ... + 1223839.

It is an arithmetic number, because the mean of its divisors is an integer number (22761936).

Almost surely, 2^195801520 is an apocalyptic number.

195801520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

195801520 is an abundant number, since it is smaller than the sum of its proper divisors (259437200).

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

195801520 is a wasteful number, since it uses less digits than its factorization.

195801520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2447532 (or 2447526 counting only the distinct ones).

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

The square root of 195801520 is about 13992.9096330963. The cubic root of 195801520 is about 580.6824309782.

The spelling of 195801520 in words is "one hundred ninety-five million, eight hundred one thousand, five hundred twenty".