505440831 has 96 divisors (see below), whose sum is σ = 871944960. Its totient is φ = 258660864.

The previous prime is 505440829. The next prime is 505440839. The reversal of 505440831 is 138044505.

It is not a de Polignac number, because 505440831 - 2¹ = 505440829 is a prime.

It is a super-2 number, since 2×505440831² = 510940867283941122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505440839) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 6923811 + ... + 6923883.

It is an arithmetic number, because the mean of its divisors is an integer number (9082760).

Almost surely, 2^505440831 is an apocalyptic number.

505440831 is a deficient number, since it is larger than the sum of its proper divisors (366504129).

505440831 is a wasteful number, since it uses less digits than its factorization.

505440831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 505440831 is about 22482.0112756844. The cubic root of 505440831 is about 796.5690731062.

The spelling of 505440831 in words is "five hundred five million, four hundred forty thousand, eight hundred thirty-one".