2158356859 has 4 divisors (see below), whose sum is σ = 2158817616. Its totient is φ = 2157896104.

The previous prime is 2158356841. The next prime is 2158356877. The reversal of 2158356859 is 9586538512.

2158356859 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (2158356841) and next prime (2158356877).

It is a cyclic number.

It is not a de Polignac number, because 2158356859 - 2¹¹ = 2158354811 is a prime.

It is a super-3 number, since 3×2158356859³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2158356899) 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, 223279 + ... + 232744.

It is an arithmetic number, because the mean of its divisors is an integer number (539704404).

Almost surely, 2^2158356859 is an apocalyptic number.

2158356859 is a deficient number, since it is larger than the sum of its proper divisors (460757).

2158356859 is an equidigital number, since it uses as much as digits as its factorization.

2158356859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460756.

The product of its digits is 2592000, while the sum is 52.

The square root of 2158356859 is about 46458.1194087750. The cubic root of 2158356859 is about 1292.3329493893.

The spelling of 2158356859 in words is "two billion, one hundred fifty-eight million, three hundred fifty-six thousand, eight hundred fifty-nine".