2516222545 has 4 divisors (see below), whose sum is σ = 3019467060. Its totient is φ = 2012978032.

The previous prime is 2516222543. The next prime is 2516222557. The reversal of 2516222545 is 5452226152.

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 1787006529 + 729216016 = 42273^2 + 27004^2 .

It is a cyclic number.

It is not a de Polignac number, because 2516222545 - 2¹ = 2516222543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2516222545.

It is not an unprimeable number, because it can be changed into a prime (2516222543) 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, 251622250 + ... + 251622259.

It is an arithmetic number, because the mean of its divisors is an integer number (754866765).

Almost surely, 2^2516222545 is an apocalyptic number.

It is an amenable number.

2516222545 is a deficient number, since it is larger than the sum of its proper divisors (503244515).

2516222545 is an equidigital number, since it uses as much as digits as its factorization.

2516222545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503244514.

The product of its digits is 48000, while the sum is 34.

The square root of 2516222545 is about 50161.9631294470. The cubic root of 2516222545 is about 1360.1381320554.

Adding to 2516222545 its reverse (5452226152), we get a palindrome (7968448697).

The spelling of 2516222545 in words is "two billion, five hundred sixteen million, two hundred twenty-two thousand, five hundred forty-five".