275891161 has 16 divisors (see below), whose sum is σ = 344348928. Its totient is φ = 215208000.

The previous prime is 275891137. The next prime is 275891171. The reversal of 275891161 is 161198572.

275891161 = 1696² + 1697² + ... + 1786².

It is a happy number.

It is not a de Polignac number, because 275891161 - 2⁹ = 275890649 is a prime.

It is a super-2 number, since 2×275891161² = 152231865435855842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (275891111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14890 + ... + 27811.

It is an arithmetic number, because the mean of its divisors is an integer number (21521808).

Almost surely, 2^275891161 is an apocalyptic number.

It is an amenable number.

275891161 is a deficient number, since it is larger than the sum of its proper divisors (68457767).

275891161 is a wasteful number, since it uses less digits than its factorization.

275891161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42792.

The product of its digits is 30240, while the sum is 40.

The square root of 275891161 is about 16609.9717338712. The cubic root of 275891161 is about 650.9974122972.

The spelling of 275891161 in words is "two hundred seventy-five million, eight hundred ninety-one thousand, one hundred sixty-one".