45185531 has 2 divisors, whose sum is σ = 45185532. Its totient is φ = 45185530.

The previous prime is 45185489. The next prime is 45185549. The reversal of 45185531 is 13558154.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 45185531 - 2¹⁰ = 45184507 is a prime.

It is a super-2 number, since 2×45185531² = 4083464423503922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (45188531) 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, 22592765 + 22592766.

It is an arithmetic number, because the mean of its divisors is an integer number (22592766).

Almost surely, 2^45185531 is an apocalyptic number.

45185531 is a deficient number, since it is larger than the sum of its proper divisors (1).

45185531 is an equidigital number, since it uses as much as digits as its factorization.

45185531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12000, while the sum is 32.

The square root of 45185531 is about 6722.0183724831. The cubic root of 45185531 is about 356.1774853535.

The spelling of 45185531 in words is "forty-five million, one hundred eighty-five thousand, five hundred thirty-one".