78052171 has 6 divisors (see below), whose sum is σ = 82376772. Its totient is φ = 73943820.

The previous prime is 78052159. The next prime is 78052187. The reversal of 78052171 is 17125087.

It is a happy number.

It is not a de Polignac number, because 78052171 - 2⁷ = 78052043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78058171) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 107745 + ... + 108466.

It is an arithmetic number, because the mean of its divisors is an integer number (13729462).

Almost surely, 2^78052171 is an apocalyptic number.

78052171 is a deficient number, since it is larger than the sum of its proper divisors (4324601).

78052171 is a wasteful number, since it uses less digits than its factorization.

78052171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216249 (or 216230 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 78052171 is about 8834.7139738647. The cubic root of 78052171 is about 427.3611071426.

The spelling of 78052171 in words is "seventy-eight million, fifty-two thousand, one hundred seventy-one".