71532291 has 4 divisors (see below), whose sum is σ = 95376392. Its totient is φ = 47688192.

The previous prime is 71532289. The next prime is 71532313. The reversal of 71532291 is 19223517.

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

It is not a de Polignac number, because 71532291 - 2¹ = 71532289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71532191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11922046 + ... + 11922051.

It is an arithmetic number, because the mean of its divisors is an integer number (23844098).

Almost surely, 2^71532291 is an apocalyptic number.

71532291 is a deficient number, since it is larger than the sum of its proper divisors (23844101).

71532291 is a wasteful number, since it uses less digits than its factorization.

71532291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23844100.

The product of its digits is 3780, while the sum is 30.

The square root of 71532291 is about 8457.6764539677. The cubic root of 71532291 is about 415.1139978112.

The spelling of 71532291 in words is "seventy-one million, five hundred thirty-two thousand, two hundred ninety-one".