2156318053 has 4 divisors (see below), whose sum is σ = 2158596000. Its totient is φ = 2154040108.

The previous prime is 2156318039. The next prime is 2156318071. The reversal of 2156318053 is 3508136512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2156318053 - 2¹³ = 2156309861 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 (2156318023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1137553 + ... + 1139446.

It is an arithmetic number, because the mean of its divisors is an integer number (539649000).

Almost surely, 2^2156318053 is an apocalyptic number.

It is an amenable number.

2156318053 is a deficient number, since it is larger than the sum of its proper divisors (2277947).

2156318053 is an equidigital number, since it uses as much as digits as its factorization.

2156318053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2277946.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 2156318053 is about 46436.1718168068. The cubic root of 2156318053 is about 1291.9259042150.

The spelling of 2156318053 in words is "two billion, one hundred fifty-six million, three hundred eighteen thousand, fifty-three".