45931217 has 4 divisors (see below), whose sum is σ = 46132020. Its totient is φ = 45730416.

The previous prime is 45931129. The next prime is 45931219. The reversal of 45931217 is 71213954.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40436881 + 5494336 = 6359^2 + 2344^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45931217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45931219) 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, 100058 + ... + 100515.

It is an arithmetic number, because the mean of its divisors is an integer number (11533005).

Almost surely, 2^45931217 is an apocalyptic number.

It is an amenable number.

45931217 is a deficient number, since it is larger than the sum of its proper divisors (200803).

45931217 is a wasteful number, since it uses less digits than its factorization.

45931217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200802.

The product of its digits is 7560, while the sum is 32.

The square root of 45931217 is about 6777.2573361206. The cubic root of 45931217 is about 358.1261090417.

The spelling of 45931217 in words is "forty-five million, nine hundred thirty-one thousand, two hundred seventeen".