45133521 has 32 divisors (see below), whose sum is σ = 67288320. Its totient is φ = 26763264.

The previous prime is 45133519. The next prime is 45133523. The reversal of 45133521 is 12533154.

45133521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (45133519) and next prime (45133523).

It is not a de Polignac number, because 45133521 - 2¹ = 45133519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 45133491 and 45133500.

It is not an unprimeable number, because it can be changed into a prime (45133523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127681 + ... + 128033.

It is an arithmetic number, because the mean of its divisors is an integer number (2102760).

Almost surely, 2^45133521 is an apocalyptic number.

It is an amenable number.

45133521 is a deficient number, since it is larger than the sum of its proper divisors (22154799).

45133521 is a wasteful number, since it uses less digits than its factorization.

45133521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505.

The product of its digits is 1800, while the sum is 24.

The square root of 45133521 is about 6718.1486289007. The cubic root of 45133521 is about 356.0407756392.

Adding to 45133521 its reverse (12533154), we get a palindrome (57666675).

It can be divided in two parts, 45133 and 521, that added together give a palindrome (45654).

The spelling of 45133521 in words is "forty-five million, one hundred thirty-three thousand, five hundred twenty-one".