2153121156 has 48 divisors (see below), whose sum is σ = 5595004800. Its totient is φ = 716056416.

The previous prime is 2153121143. The next prime is 2153121169. The reversal of 2153121156 is 6511213512.

It is an interprime number because it is at equal distance from previous prime (2153121143) and next prime (2153121169).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24706 + ... + 70118.

It is an arithmetic number, because the mean of its divisors is an integer number (116562600).

Almost surely, 2^2153121156 is an apocalyptic number.

It is an amenable number.

2153121156 is an abundant number, since it is smaller than the sum of its proper divisors (3441883644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2153121156 is a wasteful number, since it uses less digits than its factorization.

2153121156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45865 (or 45857 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 2153121156 is about 46401.7365623314. The cubic root of 2153121156 is about 1291.2871306648.

Adding to 2153121156 its reverse (6511213512), we get a palindrome (8664334668).

The spelling of 2153121156 in words is "two billion, one hundred fifty-three million, one hundred twenty-one thousand, one hundred fifty-six".