2251403509 has 2 divisors, whose sum is σ = 2251403510. Its totient is φ = 2251403508.

The previous prime is 2251403477. The next prime is 2251403527. The reversal of 2251403509 is 9053041522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1937936484 + 313467025 = 44022^2 + 17705^2 .

It is a cyclic number.

It is not a de Polignac number, because 2251403509 - 2⁵ = 2251403477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2251403579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125701754 + 1125701755.

It is an arithmetic number, because the mean of its divisors is an integer number (1125701755).

Almost surely, 2^2251403509 is an apocalyptic number.

It is an amenable number.

2251403509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251403509 is an equidigital number, since it uses as much as digits as its factorization.

2251403509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 2251403509 is about 47448.9568799990. The cubic root of 2251403509 is about 1310.6431022595.

The spelling of 2251403509 in words is "two billion, two hundred fifty-one million, four hundred three thousand, five hundred nine".