2251662389 has 2 divisors, whose sum is σ = 2251662390. Its totient is φ = 2251662388.

The previous prime is 2251662379. The next prime is 2251662407. The reversal of 2251662389 is 9832661522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1215916900 + 1035745489 = 34870^2 + 32183^2 .

It is a cyclic number.

It is not a de Polignac number, because 2251662389 - 2⁴ = 2251662373 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2251662319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125831194 + 1125831195.

It is an arithmetic number, because the mean of its divisors is an integer number (1125831195).

Almost surely, 2^2251662389 is an apocalyptic number.

It is an amenable number.

2251662389 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251662389 is an equidigital number, since it uses as much as digits as its factorization.

2251662389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 311040, while the sum is 44.

The square root of 2251662389 is about 47451.6847856849. The cubic root of 2251662389 is about 1310.6933355593.

The spelling of 2251662389 in words is "two billion, two hundred fifty-one million, six hundred sixty-two thousand, three hundred eighty-nine".