71016431 has 4 divisors (see below), whose sum is σ = 72935832. Its totient is φ = 69097032.

The previous prime is 71016427. The next prime is 71016437. The reversal of 71016431 is 13461017.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13461017 = 29 ⋅464173.

It is a cyclic number.

It is not a de Polignac number, because 71016431 - 2² = 71016427 is a prime.

It is a super-2 number, since 2×71016431² = 10086666943955522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71016397 and 71016406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71016437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 959645 + ... + 959718.

It is an arithmetic number, because the mean of its divisors is an integer number (18233958).

Almost surely, 2^71016431 is an apocalyptic number.

71016431 is a deficient number, since it is larger than the sum of its proper divisors (1919401).

71016431 is a wasteful number, since it uses less digits than its factorization.

71016431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1919400.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 71016431 is about 8427.1247172449. The cubic root of 71016431 is about 414.1137150966.

Adding to 71016431 its reverse (13461017), we get a palindrome (84477448).

The spelling of 71016431 in words is "seventy-one million, sixteen thousand, four hundred thirty-one".