2139617242 has 24 divisors (see below), whose sum is σ = 3742612020. Its totient is φ = 914719680.

The previous prime is 2139617231. The next prime is 2139617257. The reversal of 2139617242 is 2427169312.

It can be written as a sum of positive squares in 2 ways, for example, as 2136380841 + 3236401 = 46221^2 + 1799^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13392 + ... + 66772.

Almost surely, 2^2139617242 is an apocalyptic number.

2139617242 is a deficient number, since it is larger than the sum of its proper divisors (1602994778).

2139617242 is a wasteful number, since it uses less digits than its factorization.

2139617242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53806 (or 53799 counting only the distinct ones).

The product of its digits is 36288, while the sum is 37.

The square root of 2139617242 is about 46255.9968220338. The cubic root of 2139617242 is about 1288.5819086086.

The spelling of 2139617242 in words is "two billion, one hundred thirty-nine million, six hundred seventeen thousand, two hundred forty-two".