13555331 has 2 divisors, whose sum is σ = 13555332. Its totient is φ = 13555330.

The previous prime is 13555313. The next prime is 13555337. The reversal of 13555331 is 13355531.

Together with previous prime (13555313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13555331 - 2¹⁸ = 13293187 is a prime.

It is a super-2 number, since 2×13555331² = 367493997039122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13555331.

It is not a weakly prime, because it can be changed into another prime (13555337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6777665 + 6777666.

It is an arithmetic number, because the mean of its divisors is an integer number (6777666).

Almost surely, 2^13555331 is an apocalyptic number.

13555331 is a deficient number, since it is larger than the sum of its proper divisors (1).

13555331 is an equidigital number, since it uses as much as digits as its factorization.

13555331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3375, while the sum is 26.

The square root of 13555331 is about 3681.7565101457. The cubic root of 13555331 is about 238.4350198825.

The spelling of 13555331 in words is "thirteen million, five hundred fifty-five thousand, three hundred thirty-one".