2139366321 has 24 divisors (see below), whose sum is σ = 3226594176. Its totient is φ = 1363369920.

The previous prime is 2139366289. The next prime is 2139366329. The reversal of 2139366321 is 1236639312.

It is a happy number.

2139366321 is a `hidden beast` number, since 2 + 13 + 9 + 3 + 6 + 632 + 1 = 666.

It is not a de Polignac number, because 2139366321 - 2⁵ = 2139366289 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2139366329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 549301 + ... + 553181.

It is an arithmetic number, because the mean of its divisors is an integer number (134441424).

Almost surely, 2^2139366321 is an apocalyptic number.

It is an amenable number.

2139366321 is a deficient number, since it is larger than the sum of its proper divisors (1087227855).

2139366321 is a wasteful number, since it uses less digits than its factorization.

2139366321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6573 (or 6570 counting only the distinct ones).

The product of its digits is 34992, while the sum is 36.

The square root of 2139366321 is about 46253.2844347296. The cubic root of 2139366321 is about 1288.5315343493.

The spelling of 2139366321 in words is "two billion, one hundred thirty-nine million, three hundred sixty-six thousand, three hundred twenty-one".