561232131 has 32 divisors (see below), whose sum is σ = 803520000. Its totient is φ = 347643648.

The previous prime is 561232129. The next prime is 561232159. The reversal of 561232131 is 131232165.

It is not a de Polignac number, because 561232131 - 2¹ = 561232129 is a prime.

It is a super-3 number, since 3×561232131³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (561232121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 361545 + ... + 363093.

It is an arithmetic number, because the mean of its divisors is an integer number (25110000).

Almost surely, 2^561232131 is an apocalyptic number.

561232131 is a deficient number, since it is larger than the sum of its proper divisors (242287869).

561232131 is a wasteful number, since it uses less digits than its factorization.

561232131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1723.

The product of its digits is 1080, while the sum is 24.

The square root of 561232131 is about 23690.3383470984. The cubic root of 561232131 is about 824.8611365912.

Adding to 561232131 its reverse (131232165), we get a palindrome (692464296).

The spelling of 561232131 in words is "five hundred sixty-one million, two hundred thirty-two thousand, one hundred thirty-one".