31012323203 has 4 divisors (see below), whose sum is σ = 32644550760. Its totient is φ = 29380095648.

The previous prime is 31012323179. The next prime is 31012323229. The reversal of 31012323203 is 30232321013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30232321013 = 239 ⋅126495067.

It is a cyclic number.

It is not a de Polignac number, because 31012323203 - 2²⁰ = 31011274627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31012323283) 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, 816113750 + ... + 816113787.

It is an arithmetic number, because the mean of its divisors is an integer number (8161137690).

Almost surely, 2^31012323203 is an apocalyptic number.

31012323203 is a deficient number, since it is larger than the sum of its proper divisors (1632227557).

31012323203 is a wasteful number, since it uses less digits than its factorization.

31012323203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632227556.

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

Adding to 31012323203 its reverse (30232321013), we get a palindrome (61244644216).

The spelling of 31012323203 in words is "thirty-one billion, twelve million, three hundred twenty-three thousand, two hundred three".