275225021 has 2 divisors, whose sum is σ = 275225022. Its totient is φ = 275225020.

The previous prime is 275225017. The next prime is 275225033. The reversal of 275225021 is 120522572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146652100 + 128572921 = 12110^2 + 11339^2 .

It is a cyclic number.

It is not a de Polignac number, because 275225021 - 2² = 275225017 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (275225221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137612510 + 137612511.

It is an arithmetic number, because the mean of its divisors is an integer number (137612511).

Almost surely, 2^275225021 is an apocalyptic number.

It is an amenable number.

275225021 is a deficient number, since it is larger than the sum of its proper divisors (1).

275225021 is an equidigital number, since it uses as much as digits as its factorization.

275225021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 275225021 is about 16589.9072028749. The cubic root of 275225021 is about 650.4730450016.

Adding to 275225021 its reverse (120522572), we get a palindrome (395747593).

The spelling of 275225021 in words is "two hundred seventy-five million, two hundred twenty-five thousand, twenty-one".