523351561 has 4 divisors (see below), whose sum is σ = 550896400. Its totient is φ = 495806724.

The previous prime is 523351559. The next prime is 523351567. The reversal of 523351561 is 165153325.

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 523351561 - 2¹ = 523351559 is a prime.

It is a super-2 number, since 2×523351561² = 547793712802273442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (523351567) 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, 13772391 + ... + 13772428.

It is an arithmetic number, because the mean of its divisors is an integer number (137724100).

Almost surely, 2^523351561 is an apocalyptic number.

It is an amenable number.

523351561 is a deficient number, since it is larger than the sum of its proper divisors (27544839).

523351561 is a wasteful number, since it uses less digits than its factorization.

523351561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27544838.

The product of its digits is 13500, while the sum is 31.

The square root of 523351561 is about 22876.8783053982. The cubic root of 523351561 is about 805.8691080212.

The spelling of 523351561 in words is "five hundred twenty-three million, three hundred fifty-one thousand, five hundred sixty-one".