71243553 has 8 divisors (see below), whose sum is σ = 95126400. Its totient is φ = 47428208.

The previous prime is 71243539. The next prime is 71243563. The reversal of 71243553 is 35534217.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71243553 - 2⁸ = 71243297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71243553.

It is not an unprimeable number, because it can be changed into a prime (71243533) 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 7 ways as a sum of consecutive naturals, for example, 14358 + ... + 18671.

It is an arithmetic number, because the mean of its divisors is an integer number (11890800).

Almost surely, 2^71243553 is an apocalyptic number.

It is an amenable number.

71243553 is a deficient number, since it is larger than the sum of its proper divisors (23882847).

71243553 is a wasteful number, since it uses less digits than its factorization.

71243553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33751.

The product of its digits is 12600, while the sum is 30.

The square root of 71243553 is about 8440.5896121065. The cubic root of 71243553 is about 414.5547127862.

The spelling of 71243553 in words is "seventy-one million, two hundred forty-three thousand, five hundred fifty-three".