531232131 has 4 divisors (see below), whose sum is σ = 708309512. Its totient is φ = 354154752.

The previous prime is 531232129. The next prime is 531232181. The reversal of 531232131 is 131232135.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 531232131 - 2¹ = 531232129 is a prime.

It is a super-2 number, since 2×531232131² = 564415154013602322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 531232098 and 531232107.

It is not an unprimeable number, because it can be changed into a prime (531232181) 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, 88538686 + ... + 88538691.

It is an arithmetic number, because the mean of its divisors is an integer number (177077378).

Almost surely, 2^531232131 is an apocalyptic number.

531232131 is a deficient number, since it is larger than the sum of its proper divisors (177077381).

531232131 is a wasteful number, since it uses less digits than its factorization.

531232131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177077380.

The product of its digits is 540, while the sum is 21.

The square root of 531232131 is about 23048.4735069375. The cubic root of 531232131 is about 809.8938696492.

Adding to 531232131 its reverse (131232135), we get a palindrome (662464266).

The spelling of 531232131 in words is "five hundred thirty-one million, two hundred thirty-two thousand, one hundred thirty-one".