200521542131 has 4 divisors (see below), whose sum is σ = 200606117064. Its totient is φ = 200436967200.

The previous prime is 200521542113. The next prime is 200521542149. The reversal of 200521542131 is 131245125002.

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

It is an interprime number because it is at equal distance from previous prime (200521542113) and next prime (200521542149).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200521542131 is a prime.

It is a super-2 number, since 2×200521542131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 200521542131.

It is not an unprimeable number, because it can be changed into a prime (200521542191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42283910 + ... + 42288651.

It is an arithmetic number, because the mean of its divisors is an integer number (50151529266).

Almost surely, 2^200521542131 is an apocalyptic number.

200521542131 is a deficient number, since it is larger than the sum of its proper divisors (84574933).

200521542131 is an equidigital number, since it uses as much as digits as its factorization.

200521542131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84574932.

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 200521542131 its reverse (131245125002), we get a palindrome (331766667133).

The spelling of 200521542131 in words is "two hundred billion, five hundred twenty-one million, five hundred forty-two thousand, one hundred thirty-one".