2155445151 has 4 divisors (see below), whose sum is σ = 2873926872. Its totient is φ = 1436963432.

The previous prime is 2155445111. The next prime is 2155445191. The reversal of 2155445151 is 1515445512.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (2155445111) and next prime (2155445191).

It is a cyclic number.

It is not a de Polignac number, because 2155445151 - 2⁶ = 2155445087 is a prime.

It is a super-3 number, since 3×2155445151³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155445111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359240856 + ... + 359240861.

It is an arithmetic number, because the mean of its divisors is an integer number (718481718).

Almost surely, 2^2155445151 is an apocalyptic number.

2155445151 is a deficient number, since it is larger than the sum of its proper divisors (718481721).

2155445151 is an equidigital number, since it uses as much as digits as its factorization.

2155445151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718481720.

The product of its digits is 20000, while the sum is 33.

The square root of 2155445151 is about 46426.7719209510. The cubic root of 2155445151 is about 1291.7515519342.

The spelling of 2155445151 in words is "two billion, one hundred fifty-five million, four hundred forty-five thousand, one hundred fifty-one".