70505217 has 12 divisors (see below), whose sum is σ = 104008320. Its totient is φ = 46003128.

The previous prime is 70505213. The next prime is 70505231. The reversal of 70505217 is 71250507.

It is not a de Polignac number, because 70505217 - 2² = 70505213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (70505213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82917 + ... + 83762.

It is an arithmetic number, because the mean of its divisors is an integer number (8667360).

Almost surely, 2^70505217 is an apocalyptic number.

It is an amenable number.

70505217 is a deficient number, since it is larger than the sum of its proper divisors (33503103).

70505217 is a wasteful number, since it uses less digits than its factorization.

70505217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166732 (or 166729 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 70505217 is about 8396.7384739552. The cubic root of 70505217 is about 413.1176510160.

The spelling of 70505217 in words is "seventy million, five hundred five thousand, two hundred seventeen".