71540008219 has 4 divisors (see below), whose sum is σ = 71540928544. Its totient is φ = 71539087896.

The previous prime is 71540008193. The next prime is 71540008333. The reversal of 71540008219 is 91280004517.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91280004517 = 13 ⋅7021538809.

It is a cyclic number.

It is not a de Polignac number, because 71540008219 - 2⁷ = 71540008091 is a prime.

It is a super-2 number, since 2×71540008219² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71540048219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331587 + ... + 503020.

It is an arithmetic number, because the mean of its divisors is an integer number (17885232136).

Almost surely, 2^71540008219 is an apocalyptic number.

71540008219 is a deficient number, since it is larger than the sum of its proper divisors (920325).

71540008219 is an equidigital number, since it uses as much as digits as its factorization.

71540008219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920324.

The product of its (nonzero) digits is 20160, while the sum is 37.

The spelling of 71540008219 in words is "seventy-one billion, five hundred forty million, eight thousand, two hundred nineteen".