2251370647 has 4 divisors (see below), whose sum is σ = 2253643456. Its totient is φ = 2249097840.

The previous prime is 2251370621. The next prime is 2251370689. The reversal of 2251370647 is 7460731522.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7460731522 = 2 ⋅3730365761.

It is a cyclic number.

It is not a de Polignac number, because 2251370647 - 2³¹ = 103886999 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 (2251370047) 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, 1134918 + ... + 1136899.

It is an arithmetic number, because the mean of its divisors is an integer number (563410864).

Almost surely, 2^2251370647 is an apocalyptic number.

2251370647 is a deficient number, since it is larger than the sum of its proper divisors (2272809).

2251370647 is an equidigital number, since it uses as much as digits as its factorization.

2251370647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2272808.

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 2251370647 is about 47448.6105908276. The cubic root of 2251370647 is about 1310.6367254131.

The spelling of 2251370647 in words is "two billion, two hundred fifty-one million, three hundred seventy thousand, six hundred forty-seven".