275841981 has 24 divisors (see below), whose sum is σ = 420114240. Its totient is φ = 173923200.

The previous prime is 275841977. The next prime is 275841989. The reversal of 275841981 is 189148572.

It is not a de Polignac number, because 275841981 - 2² = 275841977 is a prime.

It is a super-2 number, since 2×275841981² = 152177596964008722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275841989) 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 in 23 ways as a sum of consecutive naturals, for example, 149736 + ... + 151566.

It is an arithmetic number, because the mean of its divisors is an integer number (17504760).

Almost surely, 2^275841981 is an apocalyptic number.

It is an amenable number.

275841981 is a deficient number, since it is larger than the sum of its proper divisors (144272259).

275841981 is a wasteful number, since it uses less digits than its factorization.

275841981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737 (or 2734 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 275841981 is about 16608.4912318970. The cubic root of 275841981 is about 650.9587280142.

The spelling of 275841981 in words is "two hundred seventy-five million, eight hundred forty-one thousand, nine hundred eighty-one".