3131203223 has 4 divisors (see below), whose sum is σ = 3132485280. Its totient is φ = 3129921168.

The previous prime is 3131203217. The next prime is 3131203237. The reversal of 3131203223 is 3223021313.

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 3131203223 - 2²² = 3127008919 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3131203195 and 3131203204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131200223) 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, 637358 + ... + 642251.

It is an arithmetic number, because the mean of its divisors is an integer number (783121320).

Almost surely, 2^3131203223 is an apocalyptic number.

3131203223 is a deficient number, since it is larger than the sum of its proper divisors (1282057).

3131203223 is a wasteful number, since it uses less digits than its factorization.

3131203223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1282056.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 3131203223 is about 55957.1552439900. The cubic root of 3131203223 is about 1462.9756075375.

Adding to 3131203223 its reverse (3223021313), we get a palindrome (6354224536).

The spelling of 3131203223 in words is "three billion, one hundred thirty-one million, two hundred three thousand, two hundred twenty-three".