2155441251 has 16 divisors (see below), whose sum is σ = 3001515264. Its totient is φ = 1373274144.

The previous prime is 2155441243. The next prime is 2155441261. The reversal of 2155441251 is 1521445512.

It is not a de Polignac number, because 2155441251 - 2³ = 2155441243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2155441261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68745 + ... + 95061.

It is an arithmetic number, because the mean of its divisors is an integer number (187594704).

Almost surely, 2^2155441251 is an apocalyptic number.

2155441251 is a deficient number, since it is larger than the sum of its proper divisors (846074013).

2155441251 is a wasteful number, since it uses less digits than its factorization.

2155441251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27530.

The product of its digits is 8000, while the sum is 30.

The square root of 2155441251 is about 46426.7299193040. The cubic root of 2155441251 is about 1291.7507728478.

Adding to 2155441251 its reverse (1521445512), we get a palindrome (3676886763).

The spelling of 2155441251 in words is "two billion, one hundred fifty-five million, four hundred forty-one thousand, two hundred fifty-one".