561530352231 has 16 divisors (see below), whose sum is σ = 832743141120. Its totient is φ = 373972722840.

The previous prime is 561530352217. The next prime is 561530352263. The reversal of 561530352231 is 132253035165.

561530352231 is a `hidden beast` number, since 5 + 61 + 530 + 35 + 2 + 2 + 31 = 666.

561530352231 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 561530352231 - 2¹⁸ = 561530090087 is a prime.

It is a super-2 number, since 2×561530352231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561530352731) 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, 10552005 + ... + 10605086.

It is an arithmetic number, because the mean of its divisors is an integer number (52046446320).

Almost surely, 2^561530352231 is an apocalyptic number.

561530352231 is a deficient number, since it is larger than the sum of its proper divisors (271212788889).

561530352231 is a wasteful number, since it uses less digits than its factorization.

561530352231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21158083 (or 21158077 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 36.

Adding to 561530352231 its reverse (132253035165), we get a palindrome (693783387396).

The spelling of 561530352231 in words is "five hundred sixty-one billion, five hundred thirty million, three hundred fifty-two thousand, two hundred thirty-one".