45135581 has 2 divisors, whose sum is σ = 45135582. Its totient is φ = 45135580.

The previous prime is 45135551. The next prime is 45135589. The reversal of 45135581 is 18553154.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34409956 + 10725625 = 5866^2 + 3275^2 .

It is a cyclic number.

It is not a de Polignac number, because 45135581 - 2¹⁴ = 45119197 is a prime.

It is a super-2 number, since 2×45135581² = 4074441344415122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45135589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22567790 + 22567791.

It is an arithmetic number, because the mean of its divisors is an integer number (22567791).

Almost surely, 2^45135581 is an apocalyptic number.

It is an amenable number.

45135581 is a deficient number, since it is larger than the sum of its proper divisors (1).

45135581 is an equidigital number, since it uses as much as digits as its factorization.

45135581 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 45135581 is about 6718.3019431996. The cubic root of 45135581 is about 356.0461924028.

The spelling of 45135581 in words is "forty-five million, one hundred thirty-five thousand, five hundred eighty-one".