2155145145 has 8 divisors (see below), whose sum is σ = 3448232256. Its totient is φ = 1149410736.

The previous prime is 2155145119. The next prime is 2155145177. The reversal of 2155145145 is 5415415512.

It is a happy number.

2155145145 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2155145145 - 2²⁰ = 2154096569 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71838157 + ... + 71838186.

It is an arithmetic number, because the mean of its divisors is an integer number (431029032).

Almost surely, 2^2155145145 is an apocalyptic number.

It is an amenable number.

2155145145 is a deficient number, since it is larger than the sum of its proper divisors (1293087111).

2155145145 is a wasteful number, since it uses less digits than its factorization.

2155145145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143676351.

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

The square root of 2155145145 is about 46423.5408494440. The cubic root of 2155145145 is about 1291.6916182670.

The spelling of 2155145145 in words is "two billion, one hundred fifty-five million, one hundred forty-five thousand, one hundred forty-five".