2520210545 has 4 divisors (see below), whose sum is σ = 3024252660. Its totient is φ = 2016168432.

The previous prime is 2520210491. The next prime is 2520210571. The reversal of 2520210545 is 5450120252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 682202161 + 1838008384 = 26119^2 + 42872^2 .

It is a cyclic number.

It is not a de Polignac number, because 2520210545 - 2⁶ = 2520210481 is a prime.

It is a super-2 number, since 2×2520210545² = 12702922382258394050, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252021050 + ... + 252021059.

It is an arithmetic number, because the mean of its divisors is an integer number (756063165).

Almost surely, 2^2520210545 is an apocalyptic number.

It is an amenable number.

2520210545 is a deficient number, since it is larger than the sum of its proper divisors (504042115).

2520210545 is an equidigital number, since it uses as much as digits as its factorization.

2520210545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504042114.

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 2520210545 is about 50201.6986266401. The cubic root of 2520210545 is about 1360.8563207483.

Adding to 2520210545 its reverse (5450120252), we get a palindrome (7970330797).

The spelling of 2520210545 in words is "two billion, five hundred twenty million, two hundred ten thousand, five hundred forty-five".