2155641325251 has 16 divisors (see below), whose sum is σ = 2878359167904. Its totient is φ = 1435009192704.

The previous prime is 2155641325237. The next prime is 2155641325289. The reversal of 2155641325251 is 1525231465512.

It is a happy number.

It is not a de Polignac number, because 2155641325251 - 2¹⁰ = 2155641324227 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2155641325151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30216015 + ... + 30287271.

It is an arithmetic number, because the mean of its divisors is an integer number (179897447994).

Almost surely, 2^{2155641325251} is an apocalyptic number.

2155641325251 is a deficient number, since it is larger than the sum of its proper divisors (722717842653).

2155641325251 is a wasteful number, since it uses less digits than its factorization.

2155641325251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85750.

The product of its digits is 360000, while the sum is 42.

The spelling of 2155641325251 in words is "two trillion, one hundred fifty-five billion, six hundred forty-one million, three hundred twenty-five thousand, two hundred fifty-one".