523112561 has 8 divisors (see below), whose sum is σ = 530440680. Its totient is φ = 515824128.

The previous prime is 523112543. The next prime is 523112573. The reversal of 523112561 is 165211325.

It can be written as a sum of positive squares in 4 ways, for example, as 7595536 + 515517025 = 2756^2 + 22705^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-523112561 is a prime.

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 523112561.

It is not an unprimeable number, because it can be changed into a prime (523112581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17135 + ... + 36603.

It is an arithmetic number, because the mean of its divisors is an integer number (66305085).

Almost surely, 2^523112561 is an apocalyptic number.

It is an amenable number.

523112561 is a deficient number, since it is larger than the sum of its proper divisors (7328119).

523112561 is a wasteful number, since it uses less digits than its factorization.

523112561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19843.

The product of its digits is 1800, while the sum is 26.

The square root of 523112561 is about 22871.6540940965. The cubic root of 523112561 is about 805.7464167257.

Adding to 523112561 its reverse (165211325), we get a palindrome (688323886).

It can be divided in two parts, 52311 and 2561, that added together give a cube (54872 = 38³).

The spelling of 523112561 in words is "five hundred twenty-three million, one hundred twelve thousand, five hundred sixty-one".