245775217 has 4 divisors (see below), whose sum is σ = 256461120. Its totient is φ = 235089316.

The previous prime is 245775209. The next prime is 245775227. The reversal of 245775217 is 712577542.

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 245775217 - 2³ = 245775209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 245775217.

It is not an unprimeable number, because it can be changed into a prime (245775227) 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, 5342917 + ... + 5342962.

It is an arithmetic number, because the mean of its divisors is an integer number (64115280).

Almost surely, 2^245775217 is an apocalyptic number.

It is an amenable number.

245775217 is a deficient number, since it is larger than the sum of its proper divisors (10685903).

245775217 is a wasteful number, since it uses less digits than its factorization.

245775217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10685902.

The product of its digits is 137200, while the sum is 40.

The square root of 245775217 is about 15677.2196833495. The cubic root of 245775217 is about 626.3917503890.

The spelling of 245775217 in words is "two hundred forty-five million, seven hundred seventy-five thousand, two hundred seventeen".