2125407217 has 2 divisors, whose sum is σ = 2125407218. Its totient is φ = 2125407216.

The previous prime is 2125407199. The next prime is 2125407239. The reversal of 2125407217 is 7127045212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1083989776 + 1041417441 = 32924^2 + 32271^2 .

It is a cyclic number.

It is not a de Polignac number, because 2125407217 - 2¹¹ = 2125405169 is a prime.

It is not a weakly prime, because it can be changed into another prime (2125407017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062703608 + 1062703609.

It is an arithmetic number, because the mean of its divisors is an integer number (1062703609).

Almost surely, 2^2125407217 is an apocalyptic number.

It is an amenable number.

2125407217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125407217 is an equidigital number, since it uses as much as digits as its factorization.

2125407217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 2125407217 is about 46102.1389633930. The cubic root of 2125407217 is about 1285.7229131878.

The spelling of 2125407217 in words is "two billion, one hundred twenty-five million, four hundred seven thousand, two hundred seventeen".