400200523 has 2 divisors, whose sum is σ = 400200524. Its totient is φ = 400200522.

The previous prime is 400200511. The next prime is 400200539. The reversal of 400200523 is 325002004.

It is an a-pointer prime, because the next prime (400200539) can be obtained adding 400200523 to its sum of digits (16).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400200523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 400200497 and 400200506.

It is not a weakly prime, because it can be changed into another prime (400200323) 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 as a sum of consecutive naturals, namely, 200100261 + 200100262.

It is an arithmetic number, because the mean of its divisors is an integer number (200100262).

Almost surely, 2^400200523 is an apocalyptic number.

400200523 is a deficient number, since it is larger than the sum of its proper divisors (1).

400200523 is an equidigital number, since it uses as much as digits as its factorization.

400200523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 400200523 is about 20005.0124468844. The cubic root of 400200523 is about 736.9294013345.

Adding to 400200523 its reverse (325002004), we get a palindrome (725202527).

The spelling of 400200523 in words is "four hundred million, two hundred thousand, five hundred twenty-three".