13855931 has 2 divisors, whose sum is σ = 13855932. Its totient is φ = 13855930.

The previous prime is 13855927. The next prime is 13855943. The reversal of 13855931 is 13955831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13855931 - 2² = 13855927 is a prime.

It is a super-2 number, since 2×13855931² = 383973647753522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 13855891 and 13855900.

It is not a weakly prime, because it can be changed into another prime (13855951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6927965 + 6927966.

It is an arithmetic number, because the mean of its divisors is an integer number (6927966).

Almost surely, 2^13855931 is an apocalyptic number.

13855931 is a deficient number, since it is larger than the sum of its proper divisors (1).

13855931 is an equidigital number, since it uses as much as digits as its factorization.

13855931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 35.

The square root of 13855931 is about 3722.3555714091. The cubic root of 13855931 is about 240.1846437877.

The spelling of 13855931 in words is "thirteen million, eight hundred fifty-five thousand, nine hundred thirty-one".