431541561 has 16 divisors (see below), whose sum is σ = 628197120. Its totient is φ = 261331920.

The previous prime is 431541557. The next prime is 431541563. The reversal of 431541561 is 165145134.

It is a happy number.

It is not a de Polignac number, because 431541561 - 2² = 431541557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (431541563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43666 + ... + 52628.

It is an arithmetic number, because the mean of its divisors is an integer number (39262320).

Almost surely, 2^431541561 is an apocalyptic number.

It is an amenable number.

431541561 is a deficient number, since it is larger than the sum of its proper divisors (196655559).

431541561 is a wasteful number, since it uses less digits than its factorization.

431541561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10436.

The product of its digits is 7200, while the sum is 30.

The square root of 431541561 is about 20773.5784351180. The cubic root of 431541561 is about 755.6851292970.

Adding to 431541561 its reverse (165145134), we get a palindrome (596686695).

The spelling of 431541561 in words is "four hundred thirty-one million, five hundred forty-one thousand, five hundred sixty-one".