2145322056 has 32 divisors (see below), whose sum is σ = 5596493760. Its totient is φ = 684015552.

The previous prime is 2145322043. The next prime is 2145322057. The reversal of 2145322056 is 6502235412.

It is not an unprimeable number, because it can be changed into a prime (2145322057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1942675 + ... + 1943778.

It is an arithmetic number, because the mean of its divisors is an integer number (174890430).

Almost surely, 2^2145322056 is an apocalyptic number.

It is an amenable number.

2145322056 is an abundant number, since it is smaller than the sum of its proper divisors (3451171704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2145322056 is a wasteful number, since it uses less digits than its factorization.

2145322056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3886485 (or 3886481 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 2145322056 is about 46317.6214415205. The cubic root of 2145322056 is about 1289.7261313933.

Adding to 2145322056 its reverse (6502235412), we get a palindrome (8647557468).

The spelling of 2145322056 in words is "two billion, one hundred forty-five million, three hundred twenty-two thousand, fifty-six".