45033521 has 4 divisors (see below), whose sum is σ = 48497652. Its totient is φ = 41569392.

The previous prime is 45033509. The next prime is 45033529. The reversal of 45033521 is 12533054.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12533054 = 2 ⋅6266527.

It can be written as a sum of positive squares in 2 ways, for example, as 23280625 + 21752896 = 4825^2 + 4664^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45033521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45033529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1732046 + ... + 1732071.

It is an arithmetic number, because the mean of its divisors is an integer number (12124413).

Almost surely, 2^45033521 is an apocalyptic number.

It is an amenable number.

45033521 is a deficient number, since it is larger than the sum of its proper divisors (3464131).

45033521 is a wasteful number, since it uses less digits than its factorization.

45033521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3464130.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 45033521 is about 6710.7019752035. The cubic root of 45033521 is about 355.7776275063. Note that the first 3 decimals are identical.

Adding to 45033521 its reverse (12533054), we get a palindrome (57566575).

It can be divided in two parts, 45033 and 521, that added together give a palindrome (45554).

The spelling of 45033521 in words is "forty-five million, thirty-three thousand, five hundred twenty-one".