45532021 has 4 divisors (see below), whose sum is σ = 45564012. Its totient is φ = 45500032.

The previous prime is 45532013. The next prime is 45532027. The reversal of 45532021 is 12023554.

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 37380996 + 8151025 = 6114^2 + 2855^2 .

It is a cyclic number.

It is not a de Polignac number, because 45532021 - 2³ = 45532013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 45531983 and 45532001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45532027) 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, 13756 + ... + 16741.

It is an arithmetic number, because the mean of its divisors is an integer number (11391003).

Almost surely, 2^45532021 is an apocalyptic number.

It is an amenable number.

45532021 is a deficient number, since it is larger than the sum of its proper divisors (31991).

45532021 is a wasteful number, since it uses less digits than its factorization.

45532021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31990.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 45532021 is about 6747.7419185977. The cubic root of 45532021 is about 357.0855771223.

Adding to 45532021 its reverse (12023554), we get a palindrome (57555575).

The spelling of 45532021 in words is "forty-five million, five hundred thirty-two thousand, twenty-one".