45531481 has 4 divisors (see below), whose sum is σ = 45580212. Its totient is φ = 45482752.

The previous prime is 45531469. The next prime is 45531503. The reversal of 45531481 is 18413554.

45531481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18413554 = 2 ⋅9206777.

It can be written as a sum of positive squares in 2 ways, for example, as 25200400 + 20331081 = 5020^2 + 4509^2 .

It is a cyclic number.

It is not a de Polignac number, because 45531481 - 2⁵ = 45531449 is a prime.

It is a super-2 number, since 2×45531481² = 4146231524106722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45531461) 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 3 ways as a sum of consecutive naturals, for example, 22936 + ... + 24841.

It is an arithmetic number, because the mean of its divisors is an integer number (11395053).

Almost surely, 2^45531481 is an apocalyptic number.

It is an amenable number.

45531481 is a deficient number, since it is larger than the sum of its proper divisors (48731).

45531481 is an equidigital number, since it uses as much as digits as its factorization.

45531481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48730.

The product of its digits is 9600, while the sum is 31.

The square root of 45531481 is about 6747.7019050933. The cubic root of 45531481 is about 357.0841654639.

The spelling of 45531481 in words is "forty-five million, five hundred thirty-one thousand, four hundred eighty-one".