203213310431 has 4 divisors (see below), whose sum is σ = 215167034592. Its totient is φ = 191259586272.

The previous prime is 203213310407. The next prime is 203213310473. The reversal of 203213310431 is 134013312302.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134013312302 = 2 ⋅67006656151.

It is a cyclic number.

It is not a de Polignac number, because 203213310431 - 2¹⁸ = 203213048287 is a prime.

It is a super-2 number, since 2×203213310431² (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 = 203213310397 and 203213310406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203213310331) 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, 5976862055 + ... + 5976862088.

It is an arithmetic number, because the mean of its divisors is an integer number (53791758648).

Almost surely, 2^203213310431 is an apocalyptic number.

203213310431 is a deficient number, since it is larger than the sum of its proper divisors (11953724161).

203213310431 is a wasteful number, since it uses less digits than its factorization.

203213310431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11953724160.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 203213310431 its reverse (134013312302), we get a palindrome (337226622733).

The spelling of 203213310431 in words is "two hundred three billion, two hundred thirteen million, three hundred ten thousand, four hundred thirty-one".