506207561 has 4 divisors (see below), whose sum is σ = 509238912. Its totient is φ = 503176212.

The previous prime is 506207549. The next prime is 506207573. The reversal of 506207561 is 165702605.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (506207549) and next prime (506207573).

It is a cyclic number.

It is not a de Polignac number, because 506207561 - 2¹⁴ = 506191177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (506207461) 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, 1515425 + ... + 1515758.

It is an arithmetic number, because the mean of its divisors is an integer number (127309728).

Almost surely, 2^506207561 is an apocalyptic number.

It is an amenable number.

506207561 is a deficient number, since it is larger than the sum of its proper divisors (3031351).

506207561 is a wasteful number, since it uses less digits than its factorization.

506207561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3031350.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 506207561 is about 22499.0568913455. The cubic root of 506207561 is about 796.9716555648.

The spelling of 506207561 in words is "five hundred six million, two hundred seven thousand, five hundred sixty-one".