2145922747 has 4 divisors (see below), whose sum is σ = 2239223760. Its totient is φ = 2052621736.

The previous prime is 2145922729. The next prime is 2145922769. The reversal of 2145922747 is 7472295412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2145922747 - 2¹⁵ = 2145889979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145922717) 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, 46650472 + ... + 46650517.

It is an arithmetic number, because the mean of its divisors is an integer number (559805940).

Almost surely, 2^2145922747 is an apocalyptic number.

2145922747 is a deficient number, since it is larger than the sum of its proper divisors (93301013).

2145922747 is an equidigital number, since it uses as much as digits as its factorization.

2145922747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93301012.

The product of its digits is 282240, while the sum is 43.

The square root of 2145922747 is about 46324.1054635705. The cubic root of 2145922747 is about 1289.8464947642.

The spelling of 2145922747 in words is "two billion, one hundred forty-five million, nine hundred twenty-two thousand, seven hundred forty-seven".