201523143541 has 4 divisors (see below), whose sum is σ = 212129624800. Its totient is φ = 190916662284.

The previous prime is 201523143529. The next prime is 201523143553. The reversal of 201523143541 is 145341325102.

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 an interprime number because it is at equal distance from previous prime (201523143529) and next prime (201523143553).

It is a cyclic number.

It is not a de Polignac number, because 201523143541 - 2⁷ = 201523143413 is a prime.

It is a super-2 number, since 2×201523143541² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201523143581) 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, 5303240601 + ... + 5303240638.

It is an arithmetic number, because the mean of its divisors is an integer number (53032406200).

Almost surely, 2^201523143541 is an apocalyptic number.

It is an amenable number.

201523143541 is a deficient number, since it is larger than the sum of its proper divisors (10606481259).

201523143541 is a wasteful number, since it uses less digits than its factorization.

201523143541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10606481258.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 201523143541 its reverse (145341325102), we get a palindrome (346864468643).

The spelling of 201523143541 in words is "two hundred one billion, five hundred twenty-three million, one hundred forty-three thousand, five hundred forty-one".