271139561 has 8 divisors (see below), whose sum is σ = 338044224. Its totient is φ = 211277520.

The previous prime is 271139551. The next prime is 271139581. The reversal of 271139561 is 165931172.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 271139561 - 2⁶ = 271139497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (271139501) 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 in 7 ways as a sum of consecutive naturals, for example, 1760570 + ... + 1760723.

It is an arithmetic number, because the mean of its divisors is an integer number (42255528).

Almost surely, 2^271139561 is an apocalyptic number.

It is an amenable number.

271139561 is a deficient number, since it is larger than the sum of its proper divisors (66904663).

271139561 is a wasteful number, since it uses less digits than its factorization.

271139561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521311.

The product of its digits is 11340, while the sum is 35.

The square root of 271139561 is about 16466.3159510560. The cubic root of 271139561 is about 647.2384306455.

The spelling of 271139561 in words is "two hundred seventy-one million, one hundred thirty-nine thousand, five hundred sixty-one".