523540163 has 4 divisors (see below), whose sum is σ = 526021608. Its totient is φ = 521058720.

The previous prime is 523540153. The next prime is 523540169. The reversal of 523540163 is 361045325.

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

It is a cyclic number.

It is not a de Polignac number, because 523540163 - 2²² = 519345859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523540169) 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, 1240406 + ... + 1240827.

It is an arithmetic number, because the mean of its divisors is an integer number (131505402).

Almost surely, 2^523540163 is an apocalyptic number.

523540163 is a deficient number, since it is larger than the sum of its proper divisors (2481445).

523540163 is a wasteful number, since it uses less digits than its factorization.

523540163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2481444.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 523540163 is about 22881.0000437044. Note that the first 4 decimals coincide. The cubic root of 523540163 is about 805.9659010012.

Adding to 523540163 its reverse (361045325), we get a palindrome (884585488).

The spelling of 523540163 in words is "five hundred twenty-three million, five hundred forty thousand, one hundred sixty-three".