71312019 has 8 divisors (see below), whose sum is σ = 97105920. Its totient is φ = 46529736.

The previous prime is 71311993. The next prime is 71312039. The reversal of 71312019 is 91021317.

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

It is not a de Polignac number, because 71312019 - 2²⁰ = 70263443 is a prime.

It is a super-2 number, since 2×71312019² = 10170808107712722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71312019.

It is not an unprimeable number, because it can be changed into a prime (71312039) 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, 252739 + ... + 253020.

It is an arithmetic number, because the mean of its divisors is an integer number (12138240).

Almost surely, 2^71312019 is an apocalyptic number.

71312019 is a deficient number, since it is larger than the sum of its proper divisors (25793901).

71312019 is a wasteful number, since it uses less digits than its factorization.

71312019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505809.

The product of its (nonzero) digits is 378, while the sum is 24.

The square root of 71312019 is about 8444.6443974865. The cubic root of 71312019 is about 414.6874677959.

The spelling of 71312019 in words is "seventy-one million, three hundred twelve thousand, nineteen".