45448181 has 4 divisors (see below), whose sum is σ = 45480000. Its totient is φ = 45416364.

The previous prime is 45448159. The next prime is 45448187. The reversal of 45448181 is 18184454.

It is a happy number.

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: 18184454 = 2 ⋅9092227.

It is a cyclic number.

It is not a de Polignac number, because 45448181 - 2¹⁴ = 45431797 is a prime.

It is a super-2 number, since 2×45448181² = 4131074312417522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45448187) 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, 13661 + ... + 16658.

It is an arithmetic number, because the mean of its divisors is an integer number (11370000).

Almost surely, 2^45448181 is an apocalyptic number.

It is an amenable number.

45448181 is a deficient number, since it is larger than the sum of its proper divisors (31819).

45448181 is a wasteful number, since it uses less digits than its factorization.

45448181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31818.

The product of its digits is 20480, while the sum is 35.

The square root of 45448181 is about 6741.5266075274. The cubic root of 45448181 is about 356.8662702964.

The spelling of 45448181 in words is "forty-five million, four hundred forty-eight thousand, one hundred eighty-one".