2158590887 has 4 divisors (see below), whose sum is σ = 2179963176. Its totient is φ = 2137218600.

The previous prime is 2158590859. The next prime is 2158590923. The reversal of 2158590887 is 7880958512.

2158590887 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 a cyclic number.

It is not a de Polignac number, because 2158590887 - 2⁶ = 2158590823 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158590587) 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, 10685993 + ... + 10686194.

It is an arithmetic number, because the mean of its divisors is an integer number (544990794).

Almost surely, 2^2158590887 is an apocalyptic number.

2158590887 is a deficient number, since it is larger than the sum of its proper divisors (21372289).

2158590887 is a wasteful number, since it uses less digits than its factorization.

2158590887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21372288.

The product of its (nonzero) digits is 1612800, while the sum is 53.

The square root of 2158590887 is about 46460.6380390971. The cubic root of 2158590887 is about 1292.3796563960.

The spelling of 2158590887 in words is "two billion, one hundred fifty-eight million, five hundred ninety thousand, eight hundred eighty-seven".