2158020249 has 16 divisors (see below), whose sum is σ = 3587358720. Its totient is φ = 1121049360.

The previous prime is 2158020187. The next prime is 2158020251. The reversal of 2158020249 is 9420208512.

It is not a de Polignac number, because 2158020249 - 2⁹ = 2158019737 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (2158020289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4670809 + ... + 4671270.

It is an arithmetic number, because the mean of its divisors is an integer number (224209920).

Almost surely, 2^2158020249 is an apocalyptic number.

It is an amenable number.

2158020249 is a deficient number, since it is larger than the sum of its proper divisors (1429338471).

2158020249 is a wasteful number, since it uses less digits than its factorization.

2158020249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9342100.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 2158020249 is about 46454.4965423155. The cubic root of 2158020249 is about 1292.2657632783.

The spelling of 2158020249 in words is "two billion, one hundred fifty-eight million, twenty thousand, two hundred forty-nine".