71238224 has 20 divisors (see below), whose sum is σ = 138426036. Its totient is φ = 35515392.

The previous prime is 71238221. The next prime is 71238247. The reversal of 71238224 is 42283217.

It can be written as a sum of positive squares in 2 ways, for example, as 29506624 + 41731600 = 5432^2 + 6460^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71238221) 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, 659 + ... + 11954.

Almost surely, 2^71238224 is an apocalyptic number.

It is an amenable number.

71238224 is a deficient number, since it is larger than the sum of its proper divisors (67187812).

71238224 is a wasteful number, since it uses less digits than its factorization.

71238224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12974 (or 12968 counting only the distinct ones).

The product of its digits is 5376, while the sum is 29.

The square root of 71238224 is about 8440.2739292040. The cubic root of 71238224 is about 414.5443763321.

The spelling of 71238224 in words is "seventy-one million, two hundred thirty-eight thousand, two hundred twenty-four".