45108581 has 4 divisors (see below), whose sum is σ = 51552672. Its totient is φ = 38664492.

The previous prime is 45108577. The next prime is 45108611. The reversal of 45108581 is 18580154.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18580154 = 2 ⋅9290077.

It is a cyclic number.

It is not a de Polignac number, because 45108581 - 2² = 45108577 is a prime.

It is a super-2 number, since 2×45108581² = 4069568159667122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45108521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3222035 + ... + 3222048.

It is an arithmetic number, because the mean of its divisors is an integer number (12888168).

Almost surely, 2^45108581 is an apocalyptic number.

It is an amenable number.

45108581 is a deficient number, since it is larger than the sum of its proper divisors (6444091).

45108581 is an equidigital number, since it uses as much as digits as its factorization.

45108581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6444090.

The product of its (nonzero) digits is 6400, while the sum is 32.

The square root of 45108581 is about 6716.2922062698. The cubic root of 45108581 is about 355.9751829058.

The spelling of 45108581 in words is "forty-five million, one hundred eight thousand, five hundred eighty-one".