275882381 has 4 divisors (see below), whose sum is σ = 278323932. Its totient is φ = 273440832.

The previous prime is 275882377. The next prime is 275882389. The reversal of 275882381 is 183288572.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60996100 + 214886281 = 7810^2 + 14659^2 .

It is a cyclic number.

It is not a de Polignac number, because 275882381 - 2² = 275882377 is a prime.

It is a super-2 number, since 2×275882381² = 152222176292458322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275882389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1220606 + ... + 1220831.

It is an arithmetic number, because the mean of its divisors is an integer number (69580983).

Almost surely, 2^275882381 is an apocalyptic number.

It is an amenable number.

275882381 is a deficient number, since it is larger than the sum of its proper divisors (2441551).

275882381 is a wasteful number, since it uses less digits than its factorization.

275882381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2441550.

The product of its digits is 215040, while the sum is 44.

The square root of 275882381 is about 16609.7074327033. The cubic root of 275882381 is about 650.9905064122.

The spelling of 275882381 in words is "two hundred seventy-five million, eight hundred eighty-two thousand, three hundred eighty-one".