45005531 has 2 divisors, whose sum is σ = 45005532. Its totient is φ = 45005530.

The previous prime is 45005491. The next prime is 45005537. The reversal of 45005531 is 13550054.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45005531 is a prime.

It is a super-2 number, since 2×45005531² = 4050995641183922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 45005497 and 45005506.

It is not a weakly prime, because it can be changed into another prime (45005537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22502765 + 22502766.

It is an arithmetic number, because the mean of its divisors is an integer number (22502766).

Almost surely, 2^45005531 is an apocalyptic number.

45005531 is a deficient number, since it is larger than the sum of its proper divisors (1).

45005531 is an equidigital number, since it uses as much as digits as its factorization.

45005531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 45005531 is about 6708.6161762319. The cubic root of 45005531 is about 355.7039025756.

Adding to 45005531 its reverse (13550054), we get a palindrome (58555585).

The spelling of 45005531 in words is "forty-five million, five thousand, five hundred thirty-one".