45781331 has 4 divisors (see below), whose sum is σ = 45875064. Its totient is φ = 45687600.

The previous prime is 45781319. The next prime is 45781361. The reversal of 45781331 is 13318754.

45781331 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: 13318754 = 2 ⋅6659377.

It is a cyclic number.

It is not a de Polignac number, because 45781331 - 2¹⁴ = 45764947 is a prime.

It is a super-2 number, since 2×45781331² = 4191860536263122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45781361) 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, 46130 + ... + 47111.

It is an arithmetic number, because the mean of its divisors is an integer number (11468766).

Almost surely, 2^45781331 is an apocalyptic number.

45781331 is a deficient number, since it is larger than the sum of its proper divisors (93733).

45781331 is an equidigital number, since it uses as much as digits as its factorization.

45781331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93732.

The product of its digits is 10080, while the sum is 32.

The square root of 45781331 is about 6766.1902870079. The cubic root of 45781331 is about 357.7361303715.

The spelling of 45781331 in words is "forty-five million, seven hundred eighty-one thousand, three hundred thirty-one".