31003123223 has 2 divisors, whose sum is σ = 31003123224. Its totient is φ = 31003123222.

The previous prime is 31003123183. The next prime is 31003123237. The reversal of 31003123223 is 32232130013.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31003123223 - 2⁸ = 31003122967 is a prime.

It is a super-2 number, since 2×31003123223² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31003123195 and 31003123204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31003123243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15501561611 + 15501561612.

It is an arithmetic number, because the mean of its divisors is an integer number (15501561612).

Almost surely, 2^31003123223 is an apocalyptic number.

31003123223 is a deficient number, since it is larger than the sum of its proper divisors (1).

31003123223 is an equidigital number, since it uses as much as digits as its factorization.

31003123223 is an evil number, because the sum of its binary digits is even.

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

Adding to 31003123223 its reverse (32232130013), we get a palindrome (63235253236).

The spelling of 31003123223 in words is "thirty-one billion, three million, one hundred twenty-three thousand, two hundred twenty-three".