505697331 has 16 divisors (see below), whose sum is σ = 734227200. Its totient is φ = 308373408.

The previous prime is 505697303. The next prime is 505697333. The reversal of 505697331 is 133796505.

It is not a de Polignac number, because 505697331 - 2¹¹ = 505695283 is a prime.

It is a super-2 number, since 2×505697331² = 511459581161047122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 505697331.

It is not an unprimeable number, because it can be changed into a prime (505697333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151311 + ... + 154616.

It is an arithmetic number, because the mean of its divisors is an integer number (45889200).

Almost surely, 2^505697331 is an apocalyptic number.

505697331 is a deficient number, since it is larger than the sum of its proper divisors (228529869).

505697331 is a wasteful number, since it uses less digits than its factorization.

505697331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305978.

The product of its (nonzero) digits is 85050, while the sum is 39.

The square root of 505697331 is about 22487.7151129233. The cubic root of 505697331 is about 796.7037973587.

The spelling of 505697331 in words is "five hundred five million, six hundred ninety-seven thousand, three hundred thirty-one".