45105220 has 24 divisors (see below), whose sum is σ = 97282584. Its totient is φ = 17554176.

The previous prime is 45105211. The next prime is 45105239. The reversal of 45105220 is 2250154.

It can be written as a sum of positive squares in 4 ways, for example, as 5992704 + 39112516 = 2448^2 + 6254^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29737 + ... + 31216.

It is an arithmetic number, because the mean of its divisors is an integer number (4053441).

Almost surely, 2^45105220 is an apocalyptic number.

It is an amenable number.

45105220 is an abundant number, since it is smaller than the sum of its proper divisors (52177364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45105220 is a wasteful number, since it uses less digits than its factorization.

45105220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60999 (or 60997 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 45105220 is about 6716.0419891481. The cubic root of 45105220 is about 355.9663415554.

Adding to 45105220 its reverse (2250154), we get a palindrome (47355374).

It can be divided in two parts, 4510 and 5220, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 45105220 in words is "forty-five million, one hundred five thousand, two hundred twenty".