45531021 has 8 divisors (see below), whose sum is σ = 60923680. Its totient is φ = 30246192.

The previous prime is 45531019. The next prime is 45531029. The reversal of 45531021 is 12013554.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 45531021 - 2¹ = 45531019 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45531029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25966 + ... + 27663.

It is an arithmetic number, because the mean of its divisors is an integer number (7615460).

Almost surely, 2^45531021 is an apocalyptic number.

It is an amenable number.

45531021 is a deficient number, since it is larger than the sum of its proper divisors (15392659).

45531021 is a wasteful number, since it uses less digits than its factorization.

45531021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53915.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 45531021 is about 6747.6678193284. The cubic root of 45531021 is about 357.0829629313.

Adding to 45531021 its reverse (12013554), we get a palindrome (57544575).

The spelling of 45531021 in words is "forty-five million, five hundred thirty-one thousand, twenty-one".