561362205431 has 4 divisors (see below), whose sum is σ = 562335104112. Its totient is φ = 560389306752.

The previous prime is 561362205403. The next prime is 561362205433. The reversal of 561362205431 is 134502263165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134502263165 = 5 ⋅26900452633.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561362205431 is a prime.

It is a super-2 number, since 2×561362205431² (a number of 24 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 (561362205433) 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, 486448475 + ... + 486449628.

It is an arithmetic number, because the mean of its divisors is an integer number (140583776028).

Almost surely, 2^561362205431 is an apocalyptic number.

561362205431 is a deficient number, since it is larger than the sum of its proper divisors (972898681).

561362205431 is an equidigital number, since it uses as much as digits as its factorization.

561362205431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 972898680.

The product of its (nonzero) digits is 129600, while the sum is 38.

Adding to 561362205431 its reverse (134502263165), we get a palindrome (695864468596).

The spelling of 561362205431 in words is "five hundred sixty-one billion, three hundred sixty-two million, two hundred five thousand, four hundred thirty-one".