31012031223 has 20 divisors (see below), whose sum is σ = 47924087640. Its totient is φ = 19961765712.

The previous prime is 31012031207. The next prime is 31012031231. The reversal of 31012031223 is 32213021013.

31012031223 is a `hidden beast` number, since 310 + 1 + 20 + 312 + 23 = 666.

It is not a de Polignac number, because 31012031223 - 2⁴ = 31012031207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31012031196 and 31012031205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31012031233) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6598765 + ... + 6603462.

It is an arithmetic number, because the mean of its divisors is an integer number (2396204382).

Almost surely, 2^31012031223 is an apocalyptic number.

31012031223 is a deficient number, since it is larger than the sum of its proper divisors (16912056417).

31012031223 is a wasteful number, since it uses less digits than its factorization.

31012031223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13202268 (or 13202259 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31012031223 its reverse (32213021013), we get a palindrome (63225052236).

The spelling of 31012031223 in words is "thirty-one billion, twelve million, thirty-one thousand, two hundred twenty-three".