2251793509 has 4 divisors (see below), whose sum is σ = 2573478304. Its totient is φ = 1930108716.

The previous prime is 2251793503. The next prime is 2251793521. The reversal of 2251793509 is 9053971522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2251793509 - 2³ = 2251793501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2251793501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160842387 + ... + 160842400.

It is an arithmetic number, because the mean of its divisors is an integer number (643369576).

Almost surely, 2^2251793509 is an apocalyptic number.

It is an amenable number.

2251793509 is a deficient number, since it is larger than the sum of its proper divisors (321684795).

2251793509 is an equidigital number, since it uses as much as digits as its factorization.

2251793509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321684794.

The product of its (nonzero) digits is 170100, while the sum is 43.

The square root of 2251793509 is about 47453.0663814258. The cubic root of 2251793509 is about 1310.7187767289.

The spelling of 2251793509 in words is "two billion, two hundred fifty-one million, seven hundred ninety-three thousand, five hundred nine".