2139220207 has 4 divisors (see below), whose sum is σ = 2140403256. Its totient is φ = 2138037160.

The previous prime is 2139220183. The next prime is 2139220219. The reversal of 2139220207 is 7020229312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2139220207 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 (2139220247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 588808 + ... + 592429.

It is an arithmetic number, because the mean of its divisors is an integer number (535100814).

Almost surely, 2^2139220207 is an apocalyptic number.

2139220207 is a deficient number, since it is larger than the sum of its proper divisors (1183049).

2139220207 is a wasteful number, since it uses less digits than its factorization.

2139220207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1183048.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 2139220207 is about 46251.7049091166. The cubic root of 2139220207 is about 1288.5021990611.

Adding to 2139220207 its reverse (7020229312), we get a palindrome (9159449519).

The spelling of 2139220207 in words is "two billion, one hundred thirty-nine million, two hundred twenty thousand, two hundred seven".