561657235 has 4 divisors (see below), whose sum is σ = 673988688. Its totient is φ = 449325784.

The previous prime is 561657227. The next prime is 561657251. The reversal of 561657235 is 532756165.

561657235 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.

It is a cyclic number.

It is not a de Polignac number, because 561657235 - 2³ = 561657227 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56165719 + ... + 56165728.

It is an arithmetic number, because the mean of its divisors is an integer number (168497172).

Almost surely, 2^561657235 is an apocalyptic number.

561657235 is a deficient number, since it is larger than the sum of its proper divisors (112331453).

561657235 is a wasteful number, since it uses less digits than its factorization.

561657235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112331452.

The product of its digits is 189000, while the sum is 40.

The square root of 561657235 is about 23699.3087451934. The cubic root of 561657235 is about 825.0693470939.

The spelling of 561657235 in words is "five hundred sixty-one million, six hundred fifty-seven thousand, two hundred thirty-five".