2251220113 has 2 divisors, whose sum is σ = 2251220114. Its totient is φ = 2251220112.

The previous prime is 2251220089. The next prime is 2251220117. The reversal of 2251220113 is 3110221522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2251217809 + 2304 = 47447^2 + 48^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2251220113 is a prime.

It is not a weakly prime, because it can be changed into another prime (2251220117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125610056 + 1125610057.

It is an arithmetic number, because the mean of its divisors is an integer number (1125610057).

Almost surely, 2^2251220113 is an apocalyptic number.

It is an amenable number.

2251220113 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251220113 is an equidigital number, since it uses as much as digits as its factorization.

2251220113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2251220113 is about 47447.0242797164. The cubic root of 2251220113 is about 1310.6075136103.

Adding to 2251220113 its reverse (3110221522), we get a palindrome (5361441635).

The spelling of 2251220113 in words is "two billion, two hundred fifty-one million, two hundred twenty thousand, one hundred thirteen".