2158942853 has 6 divisors (see below), whose sum is σ = 2165960754. Its totient is φ = 2151947616.

The previous prime is 2158942847. The next prime is 2158942957. The reversal of 2158942853 is 3582498512.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 566773249 + 1592169604 = 23807^2 + 39902^2 .

It is not a de Polignac number, because 2158942853 - 2⁴ = 2158942837 is a prime.

It is a super-2 number, since 2×2158942853² = 9322068485039559218, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2158942798 and 2158942807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2158942553) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86951 + ... + 108987.

It is an arithmetic number, because the mean of its divisors is an integer number (360993459).

Almost surely, 2^2158942853 is an apocalyptic number.

It is an amenable number.

2158942853 is a deficient number, since it is larger than the sum of its proper divisors (7017901).

2158942853 is an frugal number, since it uses more digits than its factorization.

2158942853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22663 (or 22350 counting only the distinct ones).

The product of its digits is 691200, while the sum is 47.

The square root of 2158942853 is about 46464.4256716899. The cubic root of 2158942853 is about 1292.4498949608.

The spelling of 2158942853 in words is "two billion, one hundred fifty-eight million, nine hundred forty-two thousand, eight hundred fifty-three".