2157102145 has 16 divisors (see below), whose sum is σ = 2824790400. Its totient is φ = 1568275200.

The previous prime is 2157102133. The next prime is 2157102149. The reversal of 2157102145 is 5412017512.

It is not a de Polignac number, because 2157102145 - 2⁵ = 2157102113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2157102149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246556 + ... + 255154.

It is an arithmetic number, because the mean of its divisors is an integer number (176549400).

Almost surely, 2^2157102145 is an apocalyptic number.

It is an amenable number.

2157102145 is a deficient number, since it is larger than the sum of its proper divisors (667688255).

2157102145 is a wasteful number, since it uses less digits than its factorization.

2157102145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13176.

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 2157102145 is about 46444.6137350716. The cubic root of 2157102145 is about 1292.0824775935.

Adding to 2157102145 its reverse (5412017512), we get a palindrome (7569119657).

The spelling of 2157102145 in words is "two billion, one hundred fifty-seven million, one hundred two thousand, one hundred forty-five".