61447217 has 12 divisors (see below), whose sum is σ = 66758400. Its totient is φ = 56532528.

The previous prime is 61447213. The next prime is 61447219. The reversal of 61447217 is 71274416.

61447217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61447217 - 2² = 61447213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61447213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100928 + ... + 101534.

It is an arithmetic number, because the mean of its divisors is an integer number (5563200).

Almost surely, 2^61447217 is an apocalyptic number.

It is an amenable number.

61447217 is a deficient number, since it is larger than the sum of its proper divisors (5311183).

61447217 is a wasteful number, since it uses less digits than its factorization.

61447217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1232 (or 1219 counting only the distinct ones).

The product of its digits is 9408, while the sum is 32.

The square root of 61447217 is about 7838.8275271242. The cubic root of 61447217 is about 394.6093815072.

The spelling of 61447217 in words is "sixty-one million, four hundred forty-seven thousand, two hundred seventeen".