78051171 has 20 divisors (see below), whose sum is σ = 114538760. Its totient is φ = 47277120.

The previous prime is 78051133. The next prime is 78051217. The reversal of 78051171 is 17115087.

It is a happy number.

It is not a de Polignac number, because 78051171 - 2¹⁸ = 77789027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78051101) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 43035 + ... + 44811.

It is an arithmetic number, because the mean of its divisors is an integer number (5726938).

Almost surely, 2^78051171 is an apocalyptic number.

78051171 is a deficient number, since it is larger than the sum of its proper divisors (36487589).

78051171 is an equidigital number, since it uses as much as digits as its factorization.

78051171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824 (or 1791 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 30.

The square root of 78051171 is about 8834.6573787556. The cubic root of 78051171 is about 427.3592820260.

The spelling of 78051171 in words is "seventy-eight million, fifty-one thousand, one hundred seventy-one".