2161358239 has 8 divisors (see below), whose sum is σ = 2175731712. Its totient is φ = 2147031000.

The previous prime is 2161358237. The next prime is 2161358261. The reversal of 2161358239 is 9328531612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2161358239 - 2¹ = 2161358237 is a prime.

It is a super-2 number, since 2×2161358239² = 9342938874586362242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161358237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84892 + ... + 107374.

It is an arithmetic number, because the mean of its divisors is an integer number (271966464).

Almost surely, 2^2161358239 is an apocalyptic number.

2161358239 is a deficient number, since it is larger than the sum of its proper divisors (14373473).

2161358239 is a wasteful number, since it uses less digits than its factorization.

2161358239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23117.

The product of its digits is 77760, while the sum is 40.

The square root of 2161358239 is about 46490.4101831765. The cubic root of 2161358239 is about 1292.9317051376.

The spelling of 2161358239 in words is "two billion, one hundred sixty-one million, three hundred fifty-eight thousand, two hundred thirty-nine".