506631531 has 12 divisors (see below), whose sum is σ = 785796072. Its totient is φ = 289503648.

The previous prime is 506631529. The next prime is 506631551. The reversal of 506631531 is 135136605.

It is not a de Polignac number, because 506631531 - 2¹ = 506631529 is a prime.

It is a super-2 number, since 2×506631531² = 513351016406807922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (506631551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1723090 + ... + 1723383.

It is an arithmetic number, because the mean of its divisors is an integer number (65483006).

Almost surely, 2^506631531 is an apocalyptic number.

506631531 is a deficient number, since it is larger than the sum of its proper divisors (279164541).

506631531 is a wasteful number, since it uses less digits than its factorization.

506631531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3446490 (or 3446483 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 506631531 is about 22508.4768698373. The cubic root of 506631531 is about 797.1940925056.

The spelling of 506631531 in words is "five hundred six million, six hundred thirty-one thousand, five hundred thirty-one".