31000113223 has 4 divisors (see below), whose sum is σ = 31436734608. Its totient is φ = 30563491840.

The previous prime is 31000113211. The next prime is 31000113229. The reversal of 31000113223 is 32231100013.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32231100013 = 7 ⋅4604442859.

It is a cyclic number.

It is not a de Polignac number, because 31000113223 - 2¹⁷ = 30999982151 is a prime.

It is a super-2 number, since 2×31000113223² (a number of 22 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 = 31000113197 and 31000113206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31000113229) 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, 218310586 + ... + 218310727.

It is an arithmetic number, because the mean of its divisors is an integer number (7859183652).

Almost surely, 2^31000113223 is an apocalyptic number.

31000113223 is a deficient number, since it is larger than the sum of its proper divisors (436621385).

31000113223 is an equidigital number, since it uses as much as digits as its factorization.

31000113223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436621384.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 31000113223 its reverse (32231100013), we get a palindrome (63231213236).

The spelling of 31000113223 in words is "thirty-one billion, one hundred thirteen thousand, two hundred twenty-three".