27427531 has 2 divisors, whose sum is σ = 27427532. Its totient is φ = 27427530.

The previous prime is 27427493. The next prime is 27427541. The reversal of 27427531 is 13572472.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 27427531 - 2⁹ = 27427019 is a prime.

It is a super-2 number, since 2×27427531² = 1504538913511922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 27427493 and 27427502.

It is not a weakly prime, because it can be changed into another prime (27427541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13713765 + 13713766.

It is an arithmetic number, because the mean of its divisors is an integer number (13713766).

Almost surely, 2^27427531 is an apocalyptic number.

27427531 is a deficient number, since it is larger than the sum of its proper divisors (1).

27427531 is an equidigital number, since it uses as much as digits as its factorization.

27427531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 31.

The square root of 27427531 is about 5237.1300346659. The cubic root of 27427531 is about 301.5751632095.

The spelling of 27427531 in words is "twenty-seven million, four hundred twenty-seven thousand, five hundred thirty-one".