531045039431 has 2 divisors, whose sum is σ = 531045039432. Its totient is φ = 531045039430.

The previous prime is 531045039409. The next prime is 531045039439. The reversal of 531045039431 is 134930540135.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531045039431 is a prime.

It is a super-2 number, since 2×531045039431² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531045039439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265522519715 + 265522519716.

It is an arithmetic number, because the mean of its divisors is an integer number (265522519716).

Almost surely, 2^531045039431 is an apocalyptic number.

531045039431 is a deficient number, since it is larger than the sum of its proper divisors (1).

531045039431 is an equidigital number, since it uses as much as digits as its factorization.

531045039431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 38.

Adding to 531045039431 its reverse (134930540135), we get a palindrome (665975579566).

The spelling of 531045039431 in words is "five hundred thirty-one billion, forty-five million, thirty-nine thousand, four hundred thirty-one".