71318819 has 8 divisors (see below), whose sum is σ = 83787312. Its totient is φ = 59847840.

The previous prime is 71318783. The next prime is 71318833. The reversal of 71318819 is 91881317.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71318819 - 2¹² = 71314723 is a prime.

It is a super-2 number, since 2×71318819² = 10172747887109522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71315819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 249224 + ... + 249509.

It is an arithmetic number, because the mean of its divisors is an integer number (10473414).

Almost surely, 2^71318819 is an apocalyptic number.

71318819 is a deficient number, since it is larger than the sum of its proper divisors (12468493).

71318819 is a wasteful number, since it uses less digits than its factorization.

71318819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498757.

The product of its digits is 12096, while the sum is 38.

The square root of 71318819 is about 8445.0470099343. The cubic root of 71318819 is about 414.7006483003.

The spelling of 71318819 in words is "seventy-one million, three hundred eighteen thousand, eight hundred nineteen".