213531020203 has 4 divisors (see below), whose sum is σ = 215604137008. Its totient is φ = 211457903400.

The previous prime is 213531020191. The next prime is 213531020221. The reversal of 213531020203 is 302020135312.

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

It is a cyclic number.

It is not a de Polignac number, because 213531020203 - 2³³ = 204941085611 is a prime.

It is a super-2 number, since 2×213531020203² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213531020293) 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, 1036558248 + ... + 1036558453.

It is an arithmetic number, because the mean of its divisors is an integer number (53901034252).

Almost surely, 2^213531020203 is an apocalyptic number.

213531020203 is a deficient number, since it is larger than the sum of its proper divisors (2073116805).

213531020203 is a wasteful number, since it uses less digits than its factorization.

213531020203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2073116804.

The product of its (nonzero) digits is 1080, while the sum is 22.

Adding to 213531020203 its reverse (302020135312), we get a palindrome (515551155515).

The spelling of 213531020203 in words is "two hundred thirteen billion, five hundred thirty-one million, twenty thousand, two hundred three".