2139852591 has 12 divisors (see below), whose sum is σ = 3115237632. Its totient is φ = 1415334816.

The previous prime is 2139852553. The next prime is 2139852619. The reversal of 2139852591 is 1952589312.

2139852591 is a `hidden beast` number, since 2 + 1 + 3 + 9 + 8 + 52 + 591 = 666.

It is not a de Polignac number, because 2139852591 - 2¹¹ = 2139850543 is a prime.

It is a super-2 number, since 2×2139852591² = 9157938222418826562, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139852521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 934926 + ... + 937211.

It is an arithmetic number, because the mean of its divisors is an integer number (259603136).

Almost surely, 2^2139852591 is an apocalyptic number.

2139852591 is a deficient number, since it is larger than the sum of its proper divisors (975385041).

2139852591 is a wasteful number, since it uses less digits than its factorization.

2139852591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872270 (or 1872267 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 2139852591 is about 46258.5407357387. The cubic root of 2139852591 is about 1288.6291530937.

The spelling of 2139852591 in words is "two billion, one hundred thirty-nine million, eight hundred fifty-two thousand, five hundred ninety-one".