71305552 has 20 divisors (see below), whose sum is σ = 138287776. Its totient is φ = 35618400.

The previous prime is 71305541. The next prime is 71305579. The reversal of 71305552 is 25550317.

It is a self number, because there is not a number n which added to its sum of digits gives 71305552.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26677 + ... + 29227.

Almost surely, 2^71305552 is an apocalyptic number.

It is an amenable number.

71305552 is a deficient number, since it is larger than the sum of its proper divisors (66982224).

71305552 is a wasteful number, since it uses less digits than its factorization.

71305552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4306 (or 4300 counting only the distinct ones).

The product of its (nonzero) digits is 5250, while the sum is 28.

The square root of 71305552 is about 8444.2614833981. The cubic root of 71305552 is about 414.6749319711.

Adding to 71305552 its reverse (25550317), we get a palindrome (96855869).

The spelling of 71305552 in words is "seventy-one million, three hundred five thousand, five hundred fifty-two".