201052317491 has 8 divisors (see below), whose sum is σ = 204627086064. Its totient is φ = 197486543520.

The previous prime is 201052317359. The next prime is 201052317497. The reversal of 201052317491 is 194713250102.

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

It is a de Polignac number, because none of the positive numbers 2^k-201052317491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201052317497) 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, 2203541 + ... + 2292966.

It is an arithmetic number, because the mean of its divisors is an integer number (25578385758).

Almost surely, 2^201052317491 is an apocalyptic number.

201052317491 is a deficient number, since it is larger than the sum of its proper divisors (3574768573).

201052317491 is an equidigital number, since it uses as much as digits as its factorization.

201052317491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4497301.

The product of its (nonzero) digits is 15120, while the sum is 35.

Adding to 201052317491 its reverse (194713250102), we get a palindrome (395765567593).

The spelling of 201052317491 in words is "two hundred one billion, fifty-two million, three hundred seventeen thousand, four hundred ninety-one".