2145306563 has 2 divisors, whose sum is σ = 2145306564. Its totient is φ = 2145306562.

The previous prime is 2145306533. The next prime is 2145306601. The reversal of 2145306563 is 3656035412.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2145306563 - 2²⁰ = 2144257987 is a prime.

It is not a weakly prime, because it can be changed into another prime (2145306533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072653281 + 1072653282.

It is an arithmetic number, because the mean of its divisors is an integer number (1072653282).

Almost surely, 2^2145306563 is an apocalyptic number.

2145306563 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145306563 is an equidigital number, since it uses as much as digits as its factorization.

2145306563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 2145306563 is about 46317.4541938566. The cubic root of 2145306563 is about 1289.7230266885.

The spelling of 2145306563 in words is "two billion, one hundred forty-five million, three hundred six thousand, five hundred sixty-three".