505250831 has 16 divisors (see below), whose sum is σ = 549212160. Its totient is φ = 463216320.

The previous prime is 505250827. The next prime is 505250833. The reversal of 505250831 is 138052505.

It is a cyclic number.

It is not a de Polignac number, because 505250831 - 2² = 505250827 is a prime.

It is a super-2 number, since 2×505250831² = 510556804452381122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 505250794 and 505250803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505250833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96380 + ... + 101486.

It is an arithmetic number, because the mean of its divisors is an integer number (34325760).

Almost surely, 2^505250831 is an apocalyptic number.

505250831 is a deficient number, since it is larger than the sum of its proper divisors (43961329).

505250831 is a wasteful number, since it uses less digits than its factorization.

505250831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5294.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 505250831 is about 22477.7852779138. The cubic root of 505250831 is about 796.4692479747.

The spelling of 505250831 in words is "five hundred five million, two hundred fifty thousand, eight hundred thirty-one".