71315643 has 8 divisors (see below), whose sum is σ = 108671488. Its totient is φ = 40751784.

The previous prime is 71315641. The next prime is 71315653. The reversal of 71315643 is 34651317.

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

It is not a de Polignac number, because 71315643 - 2¹ = 71315641 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71315643.

It is not an unprimeable number, because it can be changed into a prime (71315641) 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, 1697971 + ... + 1698012.

It is an arithmetic number, because the mean of its divisors is an integer number (13583936).

Almost surely, 2^71315643 is an apocalyptic number.

71315643 is a deficient number, since it is larger than the sum of its proper divisors (37355845).

71315643 is a wasteful number, since it uses less digits than its factorization.

71315643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3395993.

The product of its digits is 7560, while the sum is 30.

The square root of 71315643 is about 8444.8589686270. The cubic root of 71315643 is about 414.6944923337.

The spelling of 71315643 in words is "seventy-one million, three hundred fifteen thousand, six hundred forty-three".