2145254203 has 4 divisors (see below), whose sum is σ = 2145391888.
Its totient is φ = 2145116520.
The previous prime is 2145254197. The next prime is 2145254213. The reversal of 2145254203 is 3024525412.
Adding to 2145254203 its reverse (3024525412), we get a palindrome (5169779615).
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 2145254203 - 229 = 1608383291 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (2145254213) 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, 41976 + ... + 77797.
It is an arithmetic number, because the mean of its divisors is an integer number (536347972).
Almost surely, 22145254203 is an apocalyptic number.
2145254203 is a deficient number, since it is larger than the sum of its proper divisors (137685).
2145254203 is a wasteful number, since it uses less digits than its factorization.
2145254203 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 137684.
The product of its (nonzero) digits is 9600, while the sum is 28.
The square root of 2145254203 is about 46316.8889607236.
Note that the first 3 decimals coincide.
The cubic root of 2145254203 is about 1289.7125339462.
The spelling of 2145254203 in words is "two billion, one hundred forty-five million, two hundred fifty-four thousand, two hundred three".