45418181 has 8 divisors (see below), whose sum is σ = 46103904. Its totient is φ = 44735920.

The previous prime is 45418133. The next prime is 45418211. The reversal of 45418181 is 18181454.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45418181 - 2¹⁸ = 45156037 is a prime.

It is a super-2 number, since 2×45418181² = 4125622330697522, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

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 (45418381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37670 + ... + 38856.

It is an arithmetic number, because the mean of its divisors is an integer number (5762988).

Almost surely, 2^45418181 is an apocalyptic number.

It is an amenable number.

45418181 is a deficient number, since it is larger than the sum of its proper divisors (685723).

45418181 is a wasteful number, since it uses less digits than its factorization.

45418181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731.

The product of its digits is 5120, while the sum is 32.

The square root of 45418181 is about 6739.3012249046. The cubic root of 45418181 is about 356.7877314390.

The spelling of 45418181 in words is "forty-five million, four hundred eighteen thousand, one hundred eighty-one".