531126131 has 4 divisors (see below), whose sum is σ = 548259264. Its totient is φ = 513993000.

The previous prime is 531126107. The next prime is 531126137. The reversal of 531126131 is 131621135.

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

It is a cyclic number.

It is not a de Polignac number, because 531126131 - 2¹⁸ = 530863987 is a prime.

It is a super-2 number, since 2×531126131² = 564189934062058322, 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 = 531126097 and 531126106.

It is not an unprimeable number, because it can be changed into a prime (531126137) 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, 8566520 + ... + 8566581.

It is an arithmetic number, because the mean of its divisors is an integer number (137064816).

Almost surely, 2^531126131 is an apocalyptic number.

531126131 is a deficient number, since it is larger than the sum of its proper divisors (17133133).

531126131 is a wasteful number, since it uses less digits than its factorization.

531126131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17133132.

The product of its digits is 540, while the sum is 23.

The square root of 531126131 is about 23046.1738906917. The cubic root of 531126131 is about 809.8399983716.

Adding to 531126131 its reverse (131621135), we get a palindrome (662747266).

The spelling of 531126131 in words is "five hundred thirty-one million, one hundred twenty-six thousand, one hundred thirty-one".