31100023 has 2 divisors, whose sum is σ = 31100024. Its totient is φ = 31100022.

The previous prime is 31100011. The next prime is 31100039. The reversal of 31100023 is 32000113.

It is a weak prime.

It is an emirp because it is prime and its reverse (32000113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31100023 - 2¹³ = 31091831 is a prime.

It is a super-2 number, since 2×31100023² = 1934422861201058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31099982 and 31100009.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31100063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15550011 + 15550012.

It is an arithmetic number, because the mean of its divisors is an integer number (15550012).

Almost surely, 2^31100023 is an apocalyptic number.

31100023 is a deficient number, since it is larger than the sum of its proper divisors (1).

31100023 is an equidigital number, since it uses as much as digits as its factorization.

31100023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 31100023 is about 5576.7394595767. The cubic root of 31100023 is about 314.4755630705.

Adding to 31100023 its reverse (32000113), we get a palindrome (63100136).

The spelling of 31100023 in words is "thirty-one million, one hundred thousand, twenty-three".