2158100653 has 4 divisors (see below), whose sum is σ = 2172584700. Its totient is φ = 2143616608.

The previous prime is 2158100611. The next prime is 2158100669. The reversal of 2158100653 is 3560018512.

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

It can be written as a sum of positive squares in 2 ways, for example, as 702144004 + 1455956649 = 26498^2 + 38157^2 .

It is a cyclic number.

It is not a de Polignac number, because 2158100653 - 2⁹ = 2158100141 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 (2158101653) 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, 7241800 + ... + 7242097.

It is an arithmetic number, because the mean of its divisors is an integer number (543146175).

Almost surely, 2^2158100653 is an apocalyptic number.

It is an amenable number.

2158100653 is a deficient number, since it is larger than the sum of its proper divisors (14484047).

2158100653 is a wasteful number, since it uses less digits than its factorization.

2158100653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14484046.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 2158100653 is about 46455.3619402540. The cubic root of 2158100653 is about 1292.2818122544.

The spelling of 2158100653 in words is "two billion, one hundred fifty-eight million, one hundred thousand, six hundred fifty-three".