31213443003203 has 4 divisors (see below), whose sum is σ = 31974746491128. Its totient is φ = 30452139515280.

The previous prime is 31213443003187. The next prime is 31213443003241. The reversal of 31213443003203 is 30230034431213.

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 31213443003203 - 2⁴ = 31213443003187 is a prime.

It is a super-2 number, since 2×31213443003203² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31213443003263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380651743901 + ... + 380651743982.

It is an arithmetic number, because the mean of its divisors is an integer number (7993686622782).

Almost surely, 2^{31213443003203} is an apocalyptic number.

31213443003203 is a deficient number, since it is larger than the sum of its proper divisors (761303487925).

31213443003203 is an equidigital number, since it uses as much as digits as its factorization.

31213443003203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 761303487924.

The product of its (nonzero) digits is 15552, while the sum is 29.

Adding to 31213443003203 its reverse (30230034431213), we get a palindrome (61443477434416).

The spelling of 31213443003203 in words is "thirty-one trillion, two hundred thirteen billion, four hundred forty-three million, three thousand, two hundred three".