275223121 has 4 divisors (see below), whose sum is σ = 275526144. Its totient is φ = 274920100.

The previous prime is 275223101. The next prime is 275223133. The reversal of 275223121 is 121322572.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 275223121 - 2¹⁷ = 275092049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (275223101) 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, 150145 + ... + 151966.

It is an arithmetic number, because the mean of its divisors is an integer number (68881536).

Almost surely, 2^275223121 is an apocalyptic number.

It is an amenable number.

275223121 is a deficient number, since it is larger than the sum of its proper divisors (303023).

275223121 is an equidigital number, since it uses as much as digits as its factorization.

275223121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303022.

The product of its digits is 1680, while the sum is 25.

The square root of 275223121 is about 16589.8499390441. The cubic root of 275223121 is about 650.4715481639.

Adding to 275223121 its reverse (121322572), we get a palindrome (396545693).

The spelling of 275223121 in words is "two hundred seventy-five million, two hundred twenty-three thousand, one hundred twenty-one".