531423111 has 32 divisors (see below), whose sum is σ = 792557568. Its totient is φ = 315141120.

The previous prime is 531423083. The next prime is 531423121. The reversal of 531423111 is 111324135.

It is not a de Polignac number, because 531423111 - 2⁶ = 531423047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531423121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64075 + ... + 71891.

It is an arithmetic number, because the mean of its divisors is an integer number (24767424).

Almost surely, 2^531423111 is an apocalyptic number.

531423111 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

531423111 is a deficient number, since it is larger than the sum of its proper divisors (261134457).

531423111 is a wasteful number, since it uses less digits than its factorization.

531423111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7911.

The product of its digits is 360, while the sum is 21.

The square root of 531423111 is about 23052.6161422082. The cubic root of 531423111 is about 809.9909113444.

Adding to 531423111 its reverse (111324135), we get a palindrome (642747246).

The spelling of 531423111 in words is "five hundred thirty-one million, four hundred twenty-three thousand, one hundred eleven".