505534031 has 4 divisors (see below), whose sum is σ = 505923312. Its totient is φ = 505144752.

The previous prime is 505534013. The next prime is 505534033. The reversal of 505534031 is 130435505.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130435505 = 5 ⋅26087101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505534031 is a prime.

It is a super-2 number, since 2×505534031² = 511129312998217922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505534033) 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, 192686 + ... + 195291.

It is an arithmetic number, because the mean of its divisors is an integer number (126480828).

Almost surely, 2^505534031 is an apocalyptic number.

505534031 is a deficient number, since it is larger than the sum of its proper divisors (389281).

505534031 is a wasteful number, since it uses less digits than its factorization.

505534031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389280.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 505534031 is about 22484.0839484289. The cubic root of 505534031 is about 796.6180308149.

Adding to 505534031 its reverse (130435505), we get a palindrome (635969536).

The spelling of 505534031 in words is "five hundred five million, five hundred thirty-four thousand, thirty-one".