561440343 has 8 divisors (see below), whose sum is σ = 749685888. Its totient is φ = 373744184.

The previous prime is 561440339. The next prime is 561440359. The reversal of 561440343 is 343044165.

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

It is a cyclic number.

It is not a de Polignac number, because 561440343 - 2² = 561440339 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 561440343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561440323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134955 + ... + 139052.

It is an arithmetic number, because the mean of its divisors is an integer number (93710736).

Almost surely, 2^561440343 is an apocalyptic number.

561440343 is a deficient number, since it is larger than the sum of its proper divisors (188245545).

561440343 is a wasteful number, since it uses less digits than its factorization.

561440343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274693.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 561440343 is about 23694.7323892886. The cubic root of 561440343 is about 824.9631292980.

The spelling of 561440343 in words is "five hundred sixty-one million, four hundred forty thousand, three hundred forty-three".