2145511839 has 8 divisors (see below), whose sum is σ = 2860911792. Its totient is φ = 1430226560.

The previous prime is 2145511811. The next prime is 2145511847. The reversal of 2145511839 is 9381155412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2145511839 - 2⁵ = 2145511807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2145511797 and 2145511806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145511339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35527 + ... + 74519.

It is an arithmetic number, because the mean of its divisors is an integer number (357613974).

Almost surely, 2^2145511839 is an apocalyptic number.

2145511839 is a deficient number, since it is larger than the sum of its proper divisors (715399953).

2145511839 is a wasteful number, since it uses less digits than its factorization.

2145511839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57337.

The product of its digits is 43200, while the sum is 39.

The square root of 2145511839 is about 46319.6701089289. The cubic root of 2145511839 is about 1289.7641615617.

The spelling of 2145511839 in words is "two billion, one hundred forty-five million, five hundred eleven thousand, eight hundred thirty-nine".