27149531 has 2 divisors, whose sum is σ = 27149532. Its totient is φ = 27149530.

The previous prime is 27149509. The next prime is 27149557. The reversal of 27149531 is 13594172.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27149531 is a prime.

It is a super-2 number, since 2×27149531² = 1474194067039922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (27149501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13574765 + 13574766.

It is an arithmetic number, because the mean of its divisors is an integer number (13574766).

Almost surely, 2^27149531 is an apocalyptic number.

27149531 is a deficient number, since it is larger than the sum of its proper divisors (1).

27149531 is an equidigital number, since it uses as much as digits as its factorization.

27149531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560, while the sum is 32.

The square root of 27149531 is about 5210.5211831447. The cubic root of 27149531 is about 300.5527992694.

The spelling of 27149531 in words is "twenty-seven million, one hundred forty-nine thousand, five hundred thirty-one".