505564331 has 4 divisors (see below), whose sum is σ = 532173000. Its totient is φ = 478955664.

The previous prime is 505564307. The next prime is 505564361. The reversal of 505564331 is 133465505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133465505 = 5 ⋅26693101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505564331 is a prime.

It is a super-2 number, since 2×505564331² = 511190585558955122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505564361) 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, 13304306 + ... + 13304343.

It is an arithmetic number, because the mean of its divisors is an integer number (133043250).

Almost surely, 2^505564331 is an apocalyptic number.

505564331 is a deficient number, since it is larger than the sum of its proper divisors (26608669).

505564331 is a wasteful number, since it uses less digits than its factorization.

505564331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26608668.

The product of its (nonzero) digits is 27000, while the sum is 32.

The square root of 505564331 is about 22484.7577483059. The cubic root of 505564331 is about 796.6339460271.

The spelling of 505564331 in words is "five hundred five million, five hundred sixty-four thousand, three hundred thirty-one".