2220810545 has 8 divisors (see below), whose sum is σ = 2667558696. Its totient is φ = 1774924416.

The previous prime is 2220810541. The next prime is 2220810547. The reversal of 2220810545 is 5450180222.

It can be written as a sum of positive squares in 4 ways, for example, as 852698401 + 1368112144 = 29201^2 + 36988^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2220810545 - 2² = 2220810541 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2220810541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209822 + ... + 220151.

It is an arithmetic number, because the mean of its divisors is an integer number (333444837).

Almost surely, 2^2220810545 is an apocalyptic number.

It is an amenable number.

2220810545 is a deficient number, since it is larger than the sum of its proper divisors (446748151).

2220810545 is a wasteful number, since it uses less digits than its factorization.

2220810545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431011.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 2220810545 is about 47125.4766023645. The cubic root of 2220810545 is about 1304.6794953825.

Adding to 2220810545 its reverse (5450180222), we get a palindrome (7670990767).

The spelling of 2220810545 in words is "two billion, two hundred twenty million, eight hundred ten thousand, five hundred forty-five".