200531531 has 2 divisors, whose sum is σ = 200531532. Its totient is φ = 200531530.

The previous prime is 200531509. The next prime is 200531537. The reversal of 200531531 is 135135002.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200531531 is a prime.

It is a super-2 number, since 2×200531531² = 80425789850407922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (200531537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100265765 + 100265766.

It is an arithmetic number, because the mean of its divisors is an integer number (100265766).

Almost surely, 2^200531531 is an apocalyptic number.

200531531 is a deficient number, since it is larger than the sum of its proper divisors (1).

200531531 is an equidigital number, since it uses as much as digits as its factorization.

200531531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 200531531 is about 14160.9156130527. The cubic root of 200531531 is about 585.3211580605.

Adding to 200531531 its reverse (135135002), we get a palindrome (335666533).

The spelling of 200531531 in words is "two hundred million, five hundred thirty-one thousand, five hundred thirty-one".