275457221 has 4 divisors (see below), whose sum is σ = 296646252. Its totient is φ = 254268192.

The previous prime is 275457197. The next prime is 275457233. The reversal of 275457221 is 122754572.

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 149793121 + 125664100 = 12239^2 + 11210^2 .

It is a cyclic number.

It is not a de Polignac number, because 275457221 - 2⁶ = 275457157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275456221) 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, 10594496 + ... + 10594521.

It is an arithmetic number, because the mean of its divisors is an integer number (74161563).

Almost surely, 2^275457221 is an apocalyptic number.

It is an amenable number.

275457221 is a deficient number, since it is larger than the sum of its proper divisors (21189031).

275457221 is a wasteful number, since it uses less digits than its factorization.

275457221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21189030.

The product of its digits is 39200, while the sum is 35.

The square root of 275457221 is about 16596.9039582688. The cubic root of 275457221 is about 650.6559224938.

The spelling of 275457221 in words is "two hundred seventy-five million, four hundred fifty-seven thousand, two hundred twenty-one".