201671517 has 4 divisors (see below), whose sum is σ = 268895360. Its totient is φ = 134447676.

The previous prime is 201671489. The next prime is 201671537. The reversal of 201671517 is 715176102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 201671517 - 2⁷ = 201671389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201671537) 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, 33611917 + ... + 33611922.

It is an arithmetic number, because the mean of its divisors is an integer number (67223840).

Almost surely, 2^201671517 is an apocalyptic number.

It is an amenable number.

201671517 is a deficient number, since it is larger than the sum of its proper divisors (67223843).

201671517 is an equidigital number, since it uses as much as digits as its factorization.

201671517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67223842.

The product of its (nonzero) digits is 2940, while the sum is 30.

The square root of 201671517 is about 14201.1097101600. The cubic root of 201671517 is about 586.4282117102.

The spelling of 201671517 in words is "two hundred one million, six hundred seventy-one thousand, five hundred seventeen".