45381631 has 2 divisors, whose sum is σ = 45381632. Its totient is φ = 45381630.

The previous prime is 45381593. The next prime is 45381667. The reversal of 45381631 is 13618354.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 45381631 - 2⁷ = 45381503 is a prime.

It is a super-2 number, since 2×45381631² = 4118984864440322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 45381593 and 45381602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45381131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22690815 + 22690816.

It is an arithmetic number, because the mean of its divisors is an integer number (22690816).

Almost surely, 2^45381631 is an apocalyptic number.

45381631 is a deficient number, since it is larger than the sum of its proper divisors (1).

45381631 is an equidigital number, since it uses as much as digits as its factorization.

45381631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 31.

The square root of 45381631 is about 6736.5889736572. The cubic root of 45381631 is about 356.6919981814.

Adding to 45381631 its reverse (13618354), we get a palindrome (58999985).

The spelling of 45381631 in words is "forty-five million, three hundred eighty-one thousand, six hundred thirty-one".