506856361 has 4 divisors (see below), whose sum is σ = 552934224. Its totient is φ = 460778500.

The previous prime is 506856323. The next prime is 506856373. The reversal of 506856361 is 163658605.

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 506856361 - 2²¹ = 504759209 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (506856061) 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, 23038915 + ... + 23038936.

It is an arithmetic number, because the mean of its divisors is an integer number (138233556).

Almost surely, 2^506856361 is an apocalyptic number.

It is an amenable number.

506856361 is a deficient number, since it is larger than the sum of its proper divisors (46077863).

506856361 is a wasteful number, since it uses less digits than its factorization.

506856361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46077862.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 506856361 is about 22513.4706564759. The cubic root of 506856361 is about 797.3119997882.

The spelling of 506856361 in words is "five hundred six million, eight hundred fifty-six thousand, three hundred sixty-one".