45133621 has 4 divisors (see below), whose sum is σ = 48605452. Its totient is φ = 41661792.

The previous prime is 45133609. The next prime is 45133631. The reversal of 45133621 is 12633154.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5267025 + 39866596 = 2295^2 + 6314^2 .

It is a cyclic number.

It is not a de Polignac number, because 45133621 - 2¹¹ = 45131573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45133631) 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, 1735896 + ... + 1735921.

It is an arithmetic number, because the mean of its divisors is an integer number (12151363).

Almost surely, 2^45133621 is an apocalyptic number.

It is an amenable number.

45133621 is a deficient number, since it is larger than the sum of its proper divisors (3471831).

45133621 is a wasteful number, since it uses less digits than its factorization.

45133621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3471830.

The product of its digits is 2160, while the sum is 25.

The square root of 45133621 is about 6718.1560714232. The cubic root of 45133621 is about 356.0410385927.

Adding to 45133621 its reverse (12633154), we get a palindrome (57766775).

It can be divided in two parts, 45133 and 621, that added together give a palindrome (45754).

The spelling of 45133621 in words is "forty-five million, one hundred thirty-three thousand, six hundred twenty-one".