2155440151 has 4 divisors (see below), whose sum is σ = 2208011904. Its totient is φ = 2102868400.

The previous prime is 2155440073. The next prime is 2155440191. The reversal of 2155440151 is 1510445512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2155440151 - 2¹⁵ = 2155407383 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 (2155440191) 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, 26285815 + ... + 26285896.

It is an arithmetic number, because the mean of its divisors is an integer number (552002976).

Almost surely, 2^2155440151 is an apocalyptic number.

2155440151 is a deficient number, since it is larger than the sum of its proper divisors (52571753).

2155440151 is an equidigital number, since it uses as much as digits as its factorization.

2155440151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52571752.

The product of its (nonzero) digits is 4000, while the sum is 28.

The square root of 2155440151 is about 46426.7180726788. The cubic root of 2155440151 is about 1291.7505531053.

Adding to 2155440151 its reverse (1510445512), we get a palindrome (3665885663).

The spelling of 2155440151 in words is "two billion, one hundred fifty-five million, four hundred forty thousand, one hundred fifty-one".