71432530 has 16 divisors (see below), whose sum is σ = 138469464. Its totient is φ = 26375040.

The previous prime is 71432509. The next prime is 71432531. The reversal of 71432530 is 3523417.

It can be written as a sum of positive squares in 4 ways, for example, as 65464281 + 5968249 = 8091^2 + 2443^2 .

It is a junction number, because it is equal to n+sod(n) for n = 71432495 and 71432504.

It is not an unprimeable number, because it can be changed into a prime (71432531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 274611 + ... + 274870.

Almost surely, 2^71432530 is an apocalyptic number.

71432530 is a deficient number, since it is larger than the sum of its proper divisors (67036934).

71432530 is a wasteful number, since it uses less digits than its factorization.

71432530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549501.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 71432530 is about 8451.7767362845. The cubic root of 71432530 is about 414.9209313726.

Adding to 71432530 its reverse (3523417), we get a palindrome (74955947).

The spelling of 71432530 in words is "seventy-one million, four hundred thirty-two thousand, five hundred thirty".