2145321863 has 16 divisors (see below), whose sum is σ = 2304616320. Its totient is φ = 1990793376.

The previous prime is 2145321853. The next prime is 2145321887. The reversal of 2145321863 is 3681235412.

It is a cyclic number.

It is not a de Polignac number, because 2145321863 - 2²² = 2141127559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145321823) 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, 791156 + ... + 793862.

It is an arithmetic number, because the mean of its divisors is an integer number (144038520).

Almost surely, 2^2145321863 is an apocalyptic number.

2145321863 is a deficient number, since it is larger than the sum of its proper divisors (159294457).

2145321863 is a wasteful number, since it uses less digits than its factorization.

2145321863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3566.

The product of its digits is 34560, while the sum is 35.

The square root of 2145321863 is about 46317.6193580801. The cubic root of 2145321863 is about 1289.7260927174.

The spelling of 2145321863 in words is "two billion, one hundred forty-five million, three hundred twenty-one thousand, eight hundred sixty-three".