561121323 has 8 divisors (see below), whose sum is σ = 855042048. Its totient is φ = 320640744.

The previous prime is 561121291. The next prime is 561121331. The reversal of 561121323 is 323121165.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 561121323 - 2⁵ = 561121291 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 561121293 and 561121302.

It is not an unprimeable number, because it can be changed into a prime (561121523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13360011 + ... + 13360052.

It is an arithmetic number, because the mean of its divisors is an integer number (106880256).

Almost surely, 2^561121323 is an apocalyptic number.

561121323 is a deficient number, since it is larger than the sum of its proper divisors (293920725).

561121323 is a wasteful number, since it uses less digits than its factorization.

561121323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26720073.

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

The square root of 561121323 is about 23687.9995567376. Note that the first 3 decimals coincide. The cubic root of 561121323 is about 824.8068469763.

Adding to 561121323 its reverse (323121165), we get a palindrome (884242488).

The spelling of 561121323 in words is "five hundred sixty-one million, one hundred twenty-one thousand, three hundred twenty-three".