71117051 has 4 divisors (see below), whose sum is σ = 71368632. Its totient is φ = 70865472.

The previous prime is 71117023. The next prime is 71117089. The reversal of 71117051 is 15071117.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71117051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71116051) 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, 125366 + ... + 125931.

It is an arithmetic number, because the mean of its divisors is an integer number (17842158).

Almost surely, 2^71117051 is an apocalyptic number.

71117051 is a deficient number, since it is larger than the sum of its proper divisors (251581).

71117051 is a wasteful number, since it uses less digits than its factorization.

71117051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251580.

The product of its (nonzero) digits is 245, while the sum is 23.

The square root of 71117051 is about 8433.0926118477. The cubic root of 71117051 is about 414.3092025242.

Adding to 71117051 its reverse (15071117), we get a palindrome (86188168).

The spelling of 71117051 in words is "seventy-one million, one hundred seventeen thousand, fifty-one".