275925321 has 45 divisors (see below), whose sum is σ = 469108679. Its totient is φ = 156276288.

The previous prime is 275925311. The next prime is 275925323. The reversal of 275925321 is 123529572.

The square root of 275925321 is 16611.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4862025 + 271063296 = 2205^2 + 16464^2 .

It is not a de Polignac number, because 275925321 - 2⁹ = 275924809 is a prime.

It is a super-2 number, since 2×275925321² = 152269565537906082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (275925323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 2441761 + ... + 2441873.

Almost surely, 2^275925321 is an apocalyptic number.

275925321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

275925321 is the 16611-st square number.

275925321 is the 8306-th centered octagonal number.

It is an amenable number.

275925321 is a deficient number, since it is larger than the sum of its proper divisors (193183358).

275925321 is an frugal number, since it uses more digits than its factorization.

275925321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 123 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The cubic root of 275925321 is about 651.0242793581.

Multiplying 275925321 by its sum of digits (36), we get a square (9933311556 = 99666²).

The spelling of 275925321 in words is "two hundred seventy-five million, nine hundred twenty-five thousand, three hundred twenty-one".