561528143 has 4 divisors (see below), whose sum is σ = 612576168. Its totient is φ = 510480120.

The previous prime is 561528133. The next prime is 561528157. The reversal of 561528143 is 341825165.

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 561528143 - 2⁴ = 561528127 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 (561528103) 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, 25523996 + ... + 25524017.

It is an arithmetic number, because the mean of its divisors is an integer number (153144042).

Almost surely, 2^561528143 is an apocalyptic number.

561528143 is a deficient number, since it is larger than the sum of its proper divisors (51048025).

561528143 is a wasteful number, since it uses less digits than its factorization.

561528143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51048024.

The product of its digits is 28800, while the sum is 35.

The square root of 561528143 is about 23696.5850493273. The cubic root of 561528143 is about 825.0061305942.

The spelling of 561528143 in words is "five hundred sixty-one million, five hundred twenty-eight thousand, one hundred forty-three".