45531321 has 32 divisors (see below), whose sum is σ = 70616448. Its totient is φ = 25789440.

The previous prime is 45531319. The next prime is 45531323. The reversal of 45531321 is 12313554.

45531321 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 (45531319) and next prime (45531323).

It is not a de Polignac number, because 45531321 - 2¹ = 45531319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 45531291 and 45531300.

It is not an unprimeable number, because it can be changed into a prime (45531323) 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, 155251 + ... + 155543.

It is an arithmetic number, because the mean of its divisors is an integer number (2206764).

Almost surely, 2^45531321 is an apocalyptic number.

It is an amenable number.

45531321 is a deficient number, since it is larger than the sum of its proper divisors (25085127).

45531321 is a wasteful number, since it uses less digits than its factorization.

45531321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601.

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

The square root of 45531321 is about 6747.6900491946. The cubic root of 45531321 is about 357.0837471926.

Adding to 45531321 its reverse (12313554), we get a palindrome (57844875).

The spelling of 45531321 in words is "forty-five million, five hundred thirty-one thousand, three hundred twenty-one".