203213220031 has 4 divisors (see below), whose sum is σ = 203251202064. Its totient is φ = 203175238000.

The previous prime is 203213220029. The next prime is 203213220037. The reversal of 203213220031 is 130022312302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130022312302 = 2 ⋅65011156151.

It is a cyclic number.

It is not a de Polignac number, because 203213220031 - 2¹ = 203213220029 is a prime.

It is a super-2 number, since 2×203213220031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 203213219990 and 203213220008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203213220037) 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, 18982990 + ... + 18993691.

It is an arithmetic number, because the mean of its divisors is an integer number (50812800516).

Almost surely, 2^203213220031 is an apocalyptic number.

203213220031 is a deficient number, since it is larger than the sum of its proper divisors (37982033).

203213220031 is an equidigital number, since it uses as much as digits as its factorization.

203213220031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37982032.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 203213220031 its reverse (130022312302), we get a palindrome (333235532333).

The spelling of 203213220031 in words is "two hundred three billion, two hundred thirteen million, two hundred twenty thousand, thirty-one".