2255130721 has 2 divisors, whose sum is σ = 2255130722. Its totient is φ = 2255130720.

The previous prime is 2255130679. The next prime is 2255130739. The reversal of 2255130721 is 1270315522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2248182225 + 6948496 = 47415^2 + 2636^2 .

It is a cyclic number.

It is not a de Polignac number, because 2255130721 - 2⁹ = 2255130209 is a prime.

It is a super-3 number, since 3×2255130721³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 2255130721.

It is not a weakly prime, because it can be changed into another prime (2255130751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1127565360 + 1127565361.

It is an arithmetic number, because the mean of its divisors is an integer number (1127565361).

Almost surely, 2^2255130721 is an apocalyptic number.

It is an amenable number.

2255130721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2255130721 is an equidigital number, since it uses as much as digits as its factorization.

2255130721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 2255130721 is about 47488.2166542396. The cubic root of 2255130721 is about 1311.3659626760.

The spelling of 2255130721 in words is "two billion, two hundred fifty-five million, one hundred thirty thousand, seven hundred twenty-one".