561557093 has 4 divisors (see below), whose sum is σ = 561729408. Its totient is φ = 561384780.

The previous prime is 561557077. The next prime is 561557111. The reversal of 561557093 is 390755165.

561557093 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 561557093 - 2⁴ = 561557077 is a prime.

It is a super-2 number, since 2×561557093² = 630692737397221298, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 561557093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561557023) 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, 81173 + ... + 87818.

It is an arithmetic number, because the mean of its divisors is an integer number (140432352).

Almost surely, 2^561557093 is an apocalyptic number.

It is an amenable number.

561557093 is a deficient number, since it is larger than the sum of its proper divisors (172315).

561557093 is a wasteful number, since it uses less digits than its factorization.

561557093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172314.

The product of its (nonzero) digits is 141750, while the sum is 41.

The square root of 561557093 is about 23697.1958889654. The cubic root of 561557093 is about 825.0203082849.

The spelling of 561557093 in words is "five hundred sixty-one million, five hundred fifty-seven thousand, ninety-three".