2145145305 has 32 divisors (see below), whose sum is σ = 3517240320. Its totient is φ = 1116040640.

The previous prime is 2145145291. The next prime is 2145145307. The reversal of 2145145305 is 5035415412.

It is not a de Polignac number, because 2145145305 - 2⁶ = 2145145241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2145145307) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 106684 + ... + 125186.

It is an arithmetic number, because the mean of its divisors is an integer number (109913760).

Almost surely, 2^2145145305 is an apocalyptic number.

It is an amenable number.

2145145305 is a deficient number, since it is larger than the sum of its proper divisors (1372095015).

2145145305 is a wasteful number, since it uses less digits than its factorization.

2145145305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18701.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 2145145305 is about 46315.7133703023. The cubic root of 2145145305 is about 1289.6907106596.

The spelling of 2145145305 in words is "two billion, one hundred forty-five million, one hundred forty-five thousand, three hundred five".