71318401 has 16 divisors (see below), whose sum is σ = 89101440. Its totient is φ = 55457280.

The previous prime is 71318399. The next prime is 71318437. The reversal of 71318401 is 10481317.

It is a cyclic number.

It is not a de Polignac number, because 71318401 - 2¹ = 71318399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71318441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71035 + ... + 72031.

It is an arithmetic number, because the mean of its divisors is an integer number (5568840).

Almost surely, 2^71318401 is an apocalyptic number.

It is an amenable number.

71318401 is a deficient number, since it is larger than the sum of its proper divisors (17783039).

71318401 is a wasteful number, since it uses less digits than its factorization.

71318401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1944.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 71318401 is about 8445.0222616640. The cubic root of 71318401 is about 414.6998381112.

Adding to 71318401 its reverse (10481317), we get a palindrome (81799718).

The spelling of 71318401 in words is "seventy-one million, three hundred eighteen thousand, four hundred one".