195501521 has 8 divisors (see below), whose sum is σ = 200301024. Its totient is φ = 190713600.

The previous prime is 195501517. The next prime is 195501533. The reversal of 195501521 is 125105591.

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

It is not a de Polignac number, because 195501521 - 2² = 195501517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195501121) 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, 38321 + ... + 43121.

It is an arithmetic number, because the mean of its divisors is an integer number (25037628).

Almost surely, 2^195501521 is an apocalyptic number.

It is an amenable number.

195501521 is a deficient number, since it is larger than the sum of its proper divisors (4799503).

195501521 is an equidigital number, since it uses as much as digits as its factorization.

195501521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5791.

The product of its (nonzero) digits is 2250, while the sum is 29.

The square root of 195501521 is about 13982.1858448527. The cubic root of 195501521 is about 580.3857135100.

The spelling of 195501521 in words is "one hundred ninety-five million, five hundred one thousand, five hundred twenty-one".