505706031 has 16 divisors (see below), whose sum is σ = 775029600. Its totient is φ = 325511424.

The previous prime is 505706011. The next prime is 505706059. The reversal of 505706031 is 130607505.

505706031 is a `hidden beast` number, since 5 + 0 + 57 + 0 + 603 + 1 = 666.

It is not a de Polignac number, because 505706031 - 2⁷ = 505705903 is a prime.

It is a super-2 number, since 2×505706031² = 511477179579545922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 505705986 and 505706004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505706011) 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, 322146 + ... + 323711.

It is an arithmetic number, because the mean of its divisors is an integer number (48439350).

Almost surely, 2^505706031 is an apocalyptic number.

505706031 is a deficient number, since it is larger than the sum of its proper divisors (269323569).

505706031 is a wasteful number, since it uses less digits than its factorization.

505706031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645895 (or 645889 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 27.

The square root of 505706031 is about 22487.9085510414. The cubic root of 505706031 is about 796.7083661543.

The spelling of 505706031 in words is "five hundred five million, seven hundred six thousand, thirty-one".