275552221 has 4 divisors (see below), whose sum is σ = 314916832. Its totient is φ = 236187612.

The previous prime is 275552219. The next prime is 275552227. The reversal of 275552221 is 122255572.

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 275552221 - 2¹ = 275552219 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 (275552227) 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, 19682295 + ... + 19682308.

It is an arithmetic number, because the mean of its divisors is an integer number (78729208).

Almost surely, 2^275552221 is an apocalyptic number.

It is an amenable number.

275552221 is a deficient number, since it is larger than the sum of its proper divisors (39364611).

275552221 is an equidigital number, since it uses as much as digits as its factorization.

275552221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39364610.

The product of its digits is 14000, while the sum is 31.

The square root of 275552221 is about 16599.7656911175. The cubic root of 275552221 is about 650.7307135482.

The spelling of 275552221 in words is "two hundred seventy-five million, five hundred fifty-two thousand, two hundred twenty-one".