45220520 has 64 divisors (see below), whose sum is σ = 106064640. Its totient is φ = 17337600.

The previous prime is 45220519. The next prime is 45220523. The reversal of 45220520 is 2502254.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 45220492 and 45220501.

It is not an unprimeable number, because it can be changed into a prime (45220523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104705 + ... + 105135.

It is an arithmetic number, because the mean of its divisors is an integer number (1657260).

Almost surely, 2^45220520 is an apocalyptic number.

45220520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45220520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53032320).

45220520 is an abundant number, since it is smaller than the sum of its proper divisors (60844120).

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

45220520 is a wasteful number, since it uses less digits than its factorization.

45220520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546 (or 542 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 45220520 is about 6724.6204353852. The cubic root of 45220520 is about 356.2693958866.

Adding to 45220520 its reverse (2502254), we get a palindrome (47722774).

The spelling of 45220520 in words is "forty-five million, two hundred twenty thousand, five hundred twenty".