71212544 has 60 divisors (see below), whose sum is σ = 154260216. Its totient is φ = 32827392.

The previous prime is 71212523. The next prime is 71212579. The reversal of 71212544 is 44521217.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

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, 86117 + ... + 86939.

Almost surely, 2^71212544 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 71212544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77130108).

71212544 is an abundant number, since it is smaller than the sum of its proper divisors (83047672).

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

71212544 is an equidigital number, since it uses as much as digits as its factorization.

71212544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 867 (or 838 counting only the distinct ones).

The product of its digits is 2240, while the sum is 26.

The square root of 71212544 is about 8438.7525144419. The cubic root of 71212544 is about 414.4945586059.

The spelling of 71212544 in words is "seventy-one million, two hundred twelve thousand, five hundred forty-four".