203213510530 has 24 divisors (see below), whose sum is σ = 366729786612. Its totient is φ = 81075840576.

The previous prime is 203213510527. The next prime is 203213510531. The reversal of 203213510530 is 35015312302.

It can be written as a sum of positive squares in 6 ways, for example, as 78942455089 + 124271055441 = 280967^2 + 352521^2 .

It is a junction number, because it is equal to n+sod(n) for n = 203213510495 and 203213510504.

It is not an unprimeable number, because it can be changed into a prime (203213510531) 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 in 11 ways as a sum of consecutive naturals, for example, 1446064 + ... + 1580356.

Almost surely, 2^203213510530 is an apocalyptic number.

203213510530 is a deficient number, since it is larger than the sum of its proper divisors (163516276082).

203213510530 is an equidigital number, since it uses as much as digits as its factorization.

203213510530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135078 (or 134689 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 25.

Adding to 203213510530 its reverse (35015312302), we get a palindrome (238228822832).

The spelling of 203213510530 in words is "two hundred three billion, two hundred thirteen million, five hundred ten thousand, five hundred thirty".