13975531 has 2 divisors, whose sum is σ = 13975532. Its totient is φ = 13975530.

The previous prime is 13975519. The next prime is 13975537. The reversal of 13975531 is 13557931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13975531 - 2⁵ = 13975499 is a prime.

It is a super-2 number, since 2×13975531² = 390630933463922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13975537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6987765 + 6987766.

It is an arithmetic number, because the mean of its divisors is an integer number (6987766).

Almost surely, 2^13975531 is an apocalyptic number.

13975531 is a deficient number, since it is larger than the sum of its proper divisors (1).

13975531 is an equidigital number, since it uses as much as digits as its factorization.

13975531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14175, while the sum is 34.

The square root of 13975531 is about 3738.3861491291. The cubic root of 13975531 is about 240.8737307930.

The spelling of 13975531 in words is "thirteen million, nine hundred seventy-five thousand, five hundred thirty-one".