2251689553 has 4 divisors (see below), whose sum is σ = 2269419520. Its totient is φ = 2233959588.

The previous prime is 2251689529. The next prime is 2251689589. The reversal of 2251689553 is 3559861522.

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 a de Polignac number, because none of the positive numbers 2^k-2251689553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2251699553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8864793 + ... + 8865046.

It is an arithmetic number, because the mean of its divisors is an integer number (567354880).

Almost surely, 2^2251689553 is an apocalyptic number.

It is an amenable number.

2251689553 is a deficient number, since it is larger than the sum of its proper divisors (17729967).

2251689553 is a wasteful number, since it uses less digits than its factorization.

2251689553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17729966.

The product of its digits is 648000, while the sum is 46.

The square root of 2251689553 is about 47451.9710128041. The cubic root of 2251689553 is about 1310.6986062622.

The spelling of 2251689553 in words is "two billion, two hundred fifty-one million, six hundred eighty-nine thousand, five hundred fifty-three".