561231145 has 8 divisors (see below), whose sum is σ = 674296704. Its totient is φ = 448438704.

The previous prime is 561231137. The next prime is 561231163. The reversal of 561231145 is 541132165.

561231145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 561231145 - 2³ = 561231137 is a prime.

It is a super-2 number, since 2×561231145² = 629960796236022050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63729 + ... + 71998.

It is an arithmetic number, because the mean of its divisors is an integer number (84287088).

Almost surely, 2^561231145 is an apocalyptic number.

It is an amenable number.

561231145 is a deficient number, since it is larger than the sum of its proper divisors (113065559).

561231145 is a wasteful number, since it uses less digits than its factorization.

561231145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136559.

The product of its digits is 3600, while the sum is 28.

The square root of 561231145 is about 23690.3175369179. The cubic root of 561231145 is about 824.8606535388.

The spelling of 561231145 in words is "five hundred sixty-one million, two hundred thirty-one thousand, one hundred forty-five".