45243520 has 64 divisors (see below), whose sum is σ = 123624000. Its totient is φ = 15510528.

The previous prime is 45243491. The next prime is 45243521. The reversal of 45243520 is 2534254.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×45243520² = 4093952203980800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45243521) 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, 570 + ... + 9529.

It is an arithmetic number, because the mean of its divisors is an integer number (1931625).

Almost surely, 2^45243520 is an apocalyptic number.

45243520 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 45243520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61812000).

45243520 is an abundant number, since it is smaller than the sum of its proper divisors (78380480).

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

45243520 is a wasteful number, since it uses less digits than its factorization.

45243520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10125 (or 10113 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 45243520 is about 6726.3303516851. The cubic root of 45243520 is about 356.3297874025.

Adding to 45243520 its reverse (2534254), we get a palindrome (47777774).

The spelling of 45243520 in words is "forty-five million, two hundred forty-three thousand, five hundred twenty".