2145145105 has 16 divisors (see below), whose sum is σ = 2600072784. Its totient is φ = 1698887680.

The previous prime is 2145145063. The next prime is 2145145151. The reversal of 2145145105 is 5015415412.

It can be written as a sum of positive squares in 8 ways, for example, as 828979264 + 1316165841 = 28792^2 + 36279^2 .

It is not a de Polignac number, because 2145145105 - 2¹¹ = 2145143057 is a prime.

It is a super-2 number, since 2×2145145105² = 9203295043010922050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 618075 + ... + 621535.

It is an arithmetic number, because the mean of its divisors is an integer number (162504549).

Almost surely, 2^2145145105 is an apocalyptic number.

It is an amenable number.

2145145105 is a deficient number, since it is larger than the sum of its proper divisors (454927679).

2145145105 is a wasteful number, since it uses less digits than its factorization.

2145145105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4676.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 2145145105 is about 46315.7112112078. The cubic root of 2145145105 is about 1289.6906705787.

The spelling of 2145145105 in words is "two billion, one hundred forty-five million, one hundred forty-five thousand, one hundred five".