201722500541 has 4 divisors (see below), whose sum is σ = 201847873500. Its totient is φ = 201597127584.

The previous prime is 201722500517. The next prime is 201722500589. The reversal of 201722500541 is 145005227102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 120927280516 + 80795220025 = 347746^2 + 284245^2 .

It is a cyclic number.

It is not a de Polignac number, because 201722500541 - 2¹⁸ = 201722238397 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 (201722500591) 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, 62684066 + ... + 62687283.

It is an arithmetic number, because the mean of its divisors is an integer number (50461968375).

Almost surely, 2^201722500541 is an apocalyptic number.

It is an amenable number.

201722500541 is a deficient number, since it is larger than the sum of its proper divisors (125372959).

201722500541 is a wasteful number, since it uses less digits than its factorization.

201722500541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125372958.

The product of its (nonzero) digits is 5600, while the sum is 29.

Adding to 201722500541 its reverse (145005227102), we get a palindrome (346727727643).

The spelling of 201722500541 in words is "two hundred one billion, seven hundred twenty-two million, five hundred thousand, five hundred forty-one".