2145321055 has 8 divisors (see below), whose sum is σ = 2657430144. Its totient is φ = 1660893600.

The previous prime is 2145321053. The next prime is 2145321083. The reversal of 2145321055 is 5501235412.

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

It is not a de Polignac number, because 2145321055 - 2¹ = 2145321053 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 (2145321053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6920236 + ... + 6920545.

It is an arithmetic number, because the mean of its divisors is an integer number (332178768).

Almost surely, 2^2145321055 is an apocalyptic number.

2145321055 is a deficient number, since it is larger than the sum of its proper divisors (512109089).

2145321055 is a wasteful number, since it uses less digits than its factorization.

2145321055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13840817.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 2145321055 is about 46317.6106356967. The cubic root of 2145321055 is about 1289.7259307994.

Adding to 2145321055 its reverse (5501235412), we get a palindrome (7646556467).

The spelling of 2145321055 in words is "two billion, one hundred forty-five million, three hundred twenty-one thousand, fifty-five".