71509472 has 12 divisors (see below), whose sum is σ = 140784336. Its totient is φ = 35754720.

The previous prime is 71509441. The next prime is 71509499. The reversal of 71509472 is 27490517.

It is a super-2 number, since 2×71509472² = 10227209171437568, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1117304 + ... + 1117367.

It is an arithmetic number, because the mean of its divisors is an integer number (11732028).

Almost surely, 2^71509472 is an apocalyptic number.

It is an amenable number.

71509472 is a deficient number, since it is larger than the sum of its proper divisors (69274864).

71509472 is a wasteful number, since it uses less digits than its factorization.

71509472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2234681 (or 2234673 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 35.

The square root of 71509472 is about 8456.3273351970. The cubic root of 71509472 is about 415.0698522763.

Adding to 71509472 its reverse (27490517), we get a palindrome (98999989).

The spelling of 71509472 in words is "seventy-one million, five hundred nine thousand, four hundred seventy-two".