2545223515 has 4 divisors (see below), whose sum is σ = 3054268224. Its totient is φ = 2036178808.

The previous prime is 2545223491. The next prime is 2545223519. The reversal of 2545223515 is 5153225452.

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 2545223515 - 2¹¹ = 2545221467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2545223519) 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, 254522347 + ... + 254522356.

It is an arithmetic number, because the mean of its divisors is an integer number (763567056).

Almost surely, 2^2545223515 is an apocalyptic number.

2545223515 is a deficient number, since it is larger than the sum of its proper divisors (509044709).

2545223515 is an equidigital number, since it uses as much as digits as its factorization.

2545223515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509044708.

The product of its digits is 60000, while the sum is 34.

The square root of 2545223515 is about 50450.2082750904. The cubic root of 2545223515 is about 1365.3436526009.

Adding to 2545223515 its reverse (5153225452), we get a palindrome (7698448967).

The spelling of 2545223515 in words is "two billion, five hundred forty-five million, two hundred twenty-three thousand, five hundred fifteen".