45301991 has 12 divisors (see below), whose sum is σ = 54908208. Its totient is φ = 36486912.

The previous prime is 45301967. The next prime is 45301999. The reversal of 45301991 is 19910354.

45301991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 45301991 - 2¹⁸ = 45039847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45301999) 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 11 ways as a sum of consecutive naturals, for example, 73115 + ... + 73731.

It is an arithmetic number, because the mean of its divisors is an integer number (4575684).

Almost surely, 2^45301991 is an apocalyptic number.

45301991 is a deficient number, since it is larger than the sum of its proper divisors (9606217).

45301991 is an frugal number, since it uses more digits than its factorization.

45301991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258 (or 641 counting only the distinct ones).

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 45301991 is about 6730.6753747302. The cubic root of 45301991 is about 356.4832236663.

The spelling of 45301991 in words is "forty-five million, three hundred one thousand, nine hundred ninety-one".