275725221 has 8 divisors (see below), whose sum is σ = 377569824. Its totient is φ = 178848720.

The previous prime is 275725217. The next prime is 275725223. The reversal of 275725221 is 122527572.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 275725221 - 2² = 275725217 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (275725223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1241895 + ... + 1242116.

It is an arithmetic number, because the mean of its divisors is an integer number (47196228).

Almost surely, 2^275725221 is an apocalyptic number.

It is an amenable number.

275725221 is a deficient number, since it is larger than the sum of its proper divisors (101844603).

275725221 is a wasteful number, since it uses less digits than its factorization.

275725221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484051.

The product of its digits is 19600, while the sum is 33.

The square root of 275725221 is about 16604.9757904069. The cubic root of 275725221 is about 650.8668678515.

The spelling of 275725221 in words is "two hundred seventy-five million, seven hundred twenty-five thousand, two hundred twenty-one".