71563072 has 28 divisors (see below), whose sum is σ = 162295840. Its totient is φ = 30669696.

The previous prime is 71563033. The next prime is 71563109. The reversal of 71563072 is 27036517.

It is a tau number, because it is divible by the number of its divisors (28).

It is a super-3 number, since 3×71563072³ (a number of 25 digits) contains 333 as substring.

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, 79422 + ... + 80317.

It is an arithmetic number, because the mean of its divisors is an integer number (5796280).

Almost surely, 2^71563072 is an apocalyptic number.

It is an amenable number.

71563072 is an abundant number, since it is smaller than the sum of its proper divisors (90732768).

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

71563072 is a wasteful number, since it uses less digits than its factorization.

71563072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159758 (or 159748 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 31.

The square root of 71563072 is about 8459.4959660727. The cubic root of 71563072 is about 415.1735317245.

Adding to 71563072 its reverse (27036517), we get a palindrome (98599589).

The spelling of 71563072 in words is "seventy-one million, five hundred sixty-three thousand, seventy-two".