271187492981 has 2 divisors, whose sum is σ = 271187492982. Its totient is φ = 271187492980.

The previous prime is 271187492909. The next prime is 271187493029. The reversal of 271187492981 is 189294781172.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 251737006756 + 19450486225 = 501734^2 + 139465^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-271187492981 is a prime.

It is a super-2 number, since 2×271187492981² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 271187492981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (271187432981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135593746490 + 135593746491.

It is an arithmetic number, because the mean of its divisors is an integer number (135593746491).

Almost surely, 2^271187492981 is an apocalyptic number.

It is an amenable number.

271187492981 is a deficient number, since it is larger than the sum of its proper divisors (1).

271187492981 is an equidigital number, since it uses as much as digits as its factorization.

271187492981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 59.

The spelling of 271187492981 in words is "two hundred seventy-one billion, one hundred eighty-seven million, four hundred ninety-two thousand, nine hundred eighty-one".