2251549369 has 2 divisors, whose sum is σ = 2251549370. Its totient is φ = 2251549368.

The previous prime is 2251549367. The next prime is 2251549393. The reversal of 2251549369 is 9639451522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2050278400 + 201270969 = 45280^2 + 14187^2 .

It is a cyclic number.

It is not a de Polignac number, because 2251549369 - 2¹ = 2251549367 is a prime.

It is a super-2 number, since 2×2251549369² = 10138949122088596322, which contains 22 as substring.

Together with 2251549367, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2251549367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125774684 + 1125774685.

It is an arithmetic number, because the mean of its divisors is an integer number (1125774685).

Almost surely, 2^2251549369 is an apocalyptic number.

It is an amenable number.

2251549369 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251549369 is an equidigital number, since it uses as much as digits as its factorization.

2251549369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 583200, while the sum is 46.

The square root of 2251549369 is about 47450.4938751959. The cubic root of 2251549369 is about 1310.6714055340.

The spelling of 2251549369 in words is "two billion, two hundred fifty-one million, five hundred forty-nine thousand, three hundred sixty-nine".