71433520 has 20 divisors (see below), whose sum is σ = 166083120. Its totient is φ = 28573376.

The previous prime is 71433511. The next prime is 71433529. The reversal of 71433520 is 2533417.

It is an interprime number because it is at equal distance from previous prime (71433511) and next prime (71433529).

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (71433529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446380 + ... + 446539.

It is an arithmetic number, because the mean of its divisors is an integer number (8304156).

Almost surely, 2^71433520 is an apocalyptic number.

It is an amenable number.

71433520 is an abundant number, since it is smaller than the sum of its proper divisors (94649600).

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

71433520 is a wasteful number, since it uses less digits than its factorization.

71433520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 892932 (or 892926 counting only the distinct ones).

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

The square root of 71433520 is about 8451.8353036486. The cubic root of 71433520 is about 414.9228481922.

Adding to 71433520 its reverse (2533417), we get a palindrome (73966937).

The spelling of 71433520 in words is "seventy-one million, four hundred thirty-three thousand, five hundred twenty".