2145254503 has 4 divisors (see below), whose sum is σ = 2451719440.
Its totient is φ = 1838789568.
The previous prime is 2145254483. The next prime is 2145254519. The reversal of 2145254503 is 3054525412.
Adding to 2145254503 its reverse (3054525412), we get a palindrome (5199779915).
It is a semiprime because it is the product of two primes.
It is not a de Polignac number, because 2145254503 - 25 = 2145254471 is a prime.
It is an alternating number because its digits alternate between even and odd.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2145254593) 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, 153232458 + ... + 153232471.
It is an arithmetic number, because the mean of its divisors is an integer number (612929860).
Almost surely, 22145254503 is an apocalyptic number.
2145254503 is a deficient number, since it is larger than the sum of its proper divisors (306464937).
2145254503 is an equidigital number, since it uses as much as digits as its factorization.
2145254503 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 306464936.
The product of its (nonzero) digits is 24000, while the sum is 31.
The square root of 2145254503 is about 46316.8921992830.
The cubic root of 2145254503 is about 1289.7125940655.
The spelling of 2145254503 in words is "two billion, one hundred forty-five million, two hundred fifty-four thousand, five hundred three".