531047123 has 4 divisors (see below), whose sum is σ = 531124200. Its totient is φ = 530970048.

The previous prime is 531047113. The next prime is 531047147. The reversal of 531047123 is 321740135.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531047123 is a prime.

It is a super-2 number, since 2×531047123² = 564022093693154258, 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 = 531047092 and 531047101.

It is not an unprimeable number, because it can be changed into a prime (531047113) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 27065 + ... + 42362.

It is an arithmetic number, because the mean of its divisors is an integer number (132781050).

Almost surely, 2^531047123 is an apocalyptic number.

531047123 is a deficient number, since it is larger than the sum of its proper divisors (77077).

531047123 is an equidigital number, since it uses as much as digits as its factorization.

531047123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77076.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 531047123 is about 23044.4597029308. The cubic root of 531047123 is about 809.7998402950.

Adding to 531047123 its reverse (321740135), we get a palindrome (852787258).

The spelling of 531047123 in words is "five hundred thirty-one million, forty-seven thousand, one hundred twenty-three".