71216051 has 6 divisors (see below), whose sum is σ = 72135252. Its totient is φ = 70308420.

The previous prime is 71216039. The next prime is 71216059. The reversal of 71216051 is 15061217.

It is not a de Polignac number, because 71216051 - 2⁶ = 71215987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71216059) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 536 + ... + 11946.

It is an arithmetic number, because the mean of its divisors is an integer number (12022542).

Almost surely, 2^71216051 is an apocalyptic number.

71216051 is a deficient number, since it is larger than the sum of its proper divisors (919201).

71216051 is an equidigital number, since it uses as much as digits as its factorization.

71216051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11569 (or 11490 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 71216051 is about 8438.9603032601. The cubic root of 71216051 is about 414.5013626907.

Adding to 71216051 its reverse (15061217), we get a palindrome (86277268).

The spelling of 71216051 in words is "seventy-one million, two hundred sixteen thousand, fifty-one".