71191151 has 4 divisors (see below), whose sum is σ = 71423352. Its totient is φ = 70958952.

The previous prime is 71191147. The next prime is 71191171. The reversal of 71191151 is 15119117.

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

It is a cyclic number.

It is not a de Polignac number, because 71191151 - 2² = 71191147 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71191151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71191171) 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, 115640 + ... + 116253.

It is an arithmetic number, because the mean of its divisors is an integer number (17855838).

Almost surely, 2^71191151 is an apocalyptic number.

71191151 is a deficient number, since it is larger than the sum of its proper divisors (232201).

71191151 is a wasteful number, since it uses less digits than its factorization.

71191151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232200.

The product of its digits is 315, while the sum is 26.

The square root of 71191151 is about 8437.4848740605. The cubic root of 71191151 is about 414.4530482686.

The spelling of 71191151 in words is "seventy-one million, one hundred ninety-one thousand, one hundred fifty-one".