531131226 has 32 divisors (see below), whose sum is σ = 1138416768. Its totient is φ = 164767680.

The previous prime is 531131207. The next prime is 531131231. The reversal of 531131226 is 622131135.

It is a junction number, because it is equal to n+sod(n) for n = 531131196 and 531131205.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46905 + ... + 57116.

It is an arithmetic number, because the mean of its divisors is an integer number (35575524).

Almost surely, 2^531131226 is an apocalyptic number.

531131226 is an abundant number, since it is smaller than the sum of its proper divisors (607285542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531131226 is a wasteful number, since it uses less digits than its factorization.

531131226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104086.

The product of its digits is 1080, while the sum is 24.

The square root of 531131226 is about 23046.2844293825. The cubic root of 531131226 is about 809.8425879144.

Subtracting 531131226 from its reverse (622131135), we obtain a palindrome (90999909).

The spelling of 531131226 in words is "five hundred thirty-one million, one hundred thirty-one thousand, two hundred twenty-six".