2139247206 has 32 divisors (see below), whose sum is σ = 4855034880. Its totient is φ = 697909608.

The previous prime is 2139247199. The next prime is 2139247213. The reversal of 2139247206 is 6027429312.

2139247206 is a `hidden beast` number, since 21 + 392 + 47 + 206 = 666.

It is an interprime number because it is at equal distance from previous prime (2139247199) and next prime (2139247213).

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, 418906 + ... + 423981.

It is an arithmetic number, because the mean of its divisors is an integer number (151719840).

Almost surely, 2^2139247206 is an apocalyptic number.

2139247206 is an abundant number, since it is smaller than the sum of its proper divisors (2715787674).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2139247206 is a wasteful number, since it uses less digits than its factorization.

2139247206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842945 (or 842939 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 2139247206 is about 46251.9967785176. The cubic root of 2139247206 is about 1288.5076197473.

The spelling of 2139247206 in words is "two billion, one hundred thirty-nine million, two hundred forty-seven thousand, two hundred six".