71330051 has 4 divisors (see below), whose sum is σ = 76816992. Its totient is φ = 65843112.

The previous prime is 71330041. The next prime is 71330057. The reversal of 71330051 is 15003317.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15003317 = 7 ⋅2143331.

It is a cyclic number.

It is not a de Polignac number, because 71330051 - 2⁶ = 71329987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71330057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2743451 + ... + 2743476.

It is an arithmetic number, because the mean of its divisors is an integer number (19204248).

Almost surely, 2^71330051 is an apocalyptic number.

71330051 is a deficient number, since it is larger than the sum of its proper divisors (5486941).

71330051 is a wasteful number, since it uses less digits than its factorization.

71330051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5486940.

The product of its (nonzero) digits is 315, while the sum is 20.

The square root of 71330051 is about 8445.7119889326. The cubic root of 71330051 is about 414.7224175577.

Adding to 71330051 its reverse (15003317), we get a palindrome (86333368).

The spelling of 71330051 in words is "seventy-one million, three hundred thirty thousand, fifty-one".