2152106945 has 4 divisors (see below), whose sum is σ = 2582528340. Its totient is φ = 1721685552.

The previous prime is 2152106939. The next prime is 2152106989. The reversal of 2152106945 is 5496012512.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 924585649 + 1227521296 = 30407^2 + 35036^2 .

It is a cyclic number.

It is not a de Polignac number, because 2152106945 - 2⁸ = 2152106689 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215210690 + ... + 215210699.

It is an arithmetic number, because the mean of its divisors is an integer number (645632085).

Almost surely, 2^2152106945 is an apocalyptic number.

It is an amenable number.

2152106945 is a deficient number, since it is larger than the sum of its proper divisors (430421395).

2152106945 is an equidigital number, since it uses as much as digits as its factorization.

2152106945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430421394.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 2152106945 is about 46390.8066862390. The cubic root of 2152106945 is about 1291.0843485635.

The spelling of 2152106945 in words is "two billion, one hundred fifty-two million, one hundred six thousand, nine hundred forty-five".