45217945 has 8 divisors (see below), whose sum is σ = 54353736. Its totient is φ = 36112896.

The previous prime is 45217919. The next prime is 45217961. The reversal of 45217945 is 54971254.

It can be written as a sum of positive squares in 4 ways, for example, as 99856 + 45118089 = 316^2 + 6717^2 .

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 45217945 - 2¹¹ = 45215897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4312 + ... + 10441.

It is an arithmetic number, because the mean of its divisors is an integer number (6794217).

Almost surely, 2^45217945 is an apocalyptic number.

It is an amenable number.

45217945 is a deficient number, since it is larger than the sum of its proper divisors (9135791).

45217945 is a wasteful number, since it uses less digits than its factorization.

45217945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15371.

The product of its digits is 50400, while the sum is 37.

The square root of 45217945 is about 6724.4289720392. The cubic root of 45217945 is about 356.2626333880.

The spelling of 45217945 in words is "forty-five million, two hundred seventeen thousand, nine hundred forty-five".