2151144256 has 14 divisors (see below), whose sum is σ = 4268677010. Its totient is φ = 1075572096.

The previous prime is 2151144241. The next prime is 2151144257. The reversal of 2151144256 is 6524411512.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1864857856 + 286286400 = 43184^2 + 16920^2 .

It is a super-2 number, since 2×2151144256² = 9254843220243587072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151144257) 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 as a sum of consecutive naturals, namely, 16805751 + ... + 16805878.

Almost surely, 2^2151144256 is an apocalyptic number.

It is an amenable number.

2151144256 is a deficient number, since it is larger than the sum of its proper divisors (2117532754).

2151144256 is an equidigital number, since it uses as much as digits as its factorization.

2151144256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33611641 (or 33611631 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 2151144256 is about 46380.4296659701. The cubic root of 2151144256 is about 1290.8918088638.

Adding to 2151144256 its reverse (6524411512), we get a palindrome (8675555768).

The spelling of 2151144256 in words is "two billion, one hundred fifty-one million, one hundred forty-four thousand, two hundred fifty-six".