45642217 has 4 divisors (see below), whose sum is σ = 46613376. Its totient is φ = 44671060.

The previous prime is 45642211. The next prime is 45642239. The reversal of 45642217 is 71224654.

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.

It is a cyclic number.

It is not a de Polignac number, because 45642217 - 2¹¹ = 45640169 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45642211) 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, 485509 + ... + 485602.

It is an arithmetic number, because the mean of its divisors is an integer number (11653344).

Almost surely, 2^45642217 is an apocalyptic number.

45642217 is a gapful number since it is divisible by the number (47) formed by its first and last digit.

It is an amenable number.

45642217 is a deficient number, since it is larger than the sum of its proper divisors (971159).

45642217 is an equidigital number, since it uses as much as digits as its factorization.

45642217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971158.

The product of its digits is 13440, while the sum is 31.

The square root of 45642217 is about 6755.9023823617. The cubic root of 45642217 is about 357.3734163155.

The spelling of 45642217 in words is "forty-five million, six hundred forty-two thousand, two hundred seventeen".