2145323605 has 16 divisors (see below), whose sum is σ = 2624544000. Its totient is φ = 1683115200.

The previous prime is 2145323599. The next prime is 2145323627. The reversal of 2145323605 is 5063235412.

It is a happy number.

It is not a de Polignac number, because 2145323605 - 2²¹ = 2143226453 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40630 + ... + 77080.

It is an arithmetic number, because the mean of its divisors is an integer number (164034000).

Almost surely, 2^2145323605 is an apocalyptic number.

It is an amenable number.

2145323605 is a deficient number, since it is larger than the sum of its proper divisors (479220395).

2145323605 is a wasteful number, since it uses less digits than its factorization.

2145323605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36684.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 2145323605 is about 46317.6381630152. The cubic root of 2145323605 is about 1289.7264418029.

The spelling of 2145323605 in words is "two billion, one hundred forty-five million, three hundred twenty-three thousand, six hundred five".