45381131 has 2 divisors, whose sum is σ = 45381132. Its totient is φ = 45381130.

The previous prime is 45381121. The next prime is 45381157. The reversal of 45381131 is 13118354.

45381131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (45381157) can be obtained adding 45381131 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 45381131 - 2¹⁰ = 45380107 is a prime.

It is a super-2 number, since 2×45381131² = 4118894101678322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 45381131.

It is not a weakly prime, because it can be changed into another prime (45381121) 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 as a sum of consecutive naturals, namely, 22690565 + 22690566.

It is an arithmetic number, because the mean of its divisors is an integer number (22690566).

Almost surely, 2^45381131 is an apocalyptic number.

45381131 is a deficient number, since it is larger than the sum of its proper divisors (1).

45381131 is an equidigital number, since it uses as much as digits as its factorization.

45381131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 26.

The square root of 45381131 is about 6736.5518627856. The cubic root of 45381131 is about 356.6906882046.

Adding to 45381131 its reverse (13118354), we get a palindrome (58499485).

The spelling of 45381131 in words is "forty-five million, three hundred eighty-one thousand, one hundred thirty-one".