71159551 has 4 divisors (see below), whose sum is σ = 72673632. Its totient is φ = 69645472.

The previous prime is 71159531. The next prime is 71159563. The reversal of 71159551 is 15595117.

It is a happy number.

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 71159551 - 2⁵ = 71159519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71159531) 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, 756970 + ... + 757063.

It is an arithmetic number, because the mean of its divisors is an integer number (18168408).

Almost surely, 2^71159551 is an apocalyptic number.

71159551 is a deficient number, since it is larger than the sum of its proper divisors (1514081).

71159551 is a wasteful number, since it uses less digits than its factorization.

71159551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1514080.

The product of its digits is 7875, while the sum is 34.

The square root of 71159551 is about 8435.6120702650. The cubic root of 71159551 is about 414.3917173569.

The spelling of 71159551 in words is "seventy-one million, one hundred fifty-nine thousand, five hundred fifty-one".