500423531 has 2 divisors, whose sum is σ = 500423532. Its totient is φ = 500423530.

The previous prime is 500423479. The next prime is 500423533. The reversal of 500423531 is 135324005.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-500423531 is a prime.

It is a super-2 number, since 2×500423531² = 500847420757015922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 500423533, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 500423497 and 500423506.

It is not a weakly prime, because it can be changed into another prime (500423533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250211765 + 250211766.

It is an arithmetic number, because the mean of its divisors is an integer number (250211766).

Almost surely, 2^500423531 is an apocalyptic number.

500423531 is a deficient number, since it is larger than the sum of its proper divisors (1).

500423531 is an equidigital number, since it uses as much as digits as its factorization.

500423531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 500423531 is about 22370.1482113999. The cubic root of 500423531 is about 793.9245672554.

Adding to 500423531 its reverse (135324005), we get a palindrome (635747536).

The spelling of 500423531 in words is "five hundred million, four hundred twenty-three thousand, five hundred thirty-one".