71287552 has 54 divisors (see below), whose sum is σ = 165557868. Its totient is φ = 30546432.

The previous prime is 71287543. The next prime is 71287583. The reversal of 71287552 is 25578217.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9703 + ... + 15385.

Almost surely, 2^71287552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71287552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82778934).

71287552 is an abundant number, since it is smaller than the sum of its proper divisors (94270316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71287552 is an equidigital number, since it uses as much as digits as its factorization.

71287552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5713 (or 5692 counting only the distinct ones).

The product of its digits is 39200, while the sum is 37.

The square root of 71287552 is about 8443.1956035615. The cubic root of 71287552 is about 414.6400362455.

The spelling of 71287552 in words is "seventy-one million, two hundred eighty-seven thousand, five hundred fifty-two".