71224152 has 32 divisors (see below), whose sum is σ = 188535600. Its totient is φ = 22344704.

The previous prime is 71224099. The next prime is 71224159. The reversal of 71224152 is 25142217.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71224159) 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, 86877 + ... + 87692.

Almost surely, 2^71224152 is an apocalyptic number.

It is an amenable number.

71224152 is an abundant number, since it is smaller than the sum of its proper divisors (117311448).

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

71224152 is a wasteful number, since it uses less digits than its factorization.

71224152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174595 (or 174591 counting only the distinct ones).

The product of its digits is 1120, while the sum is 24.

The square root of 71224152 is about 8439.4402657996. The cubic root of 71224152 is about 414.5170789428.

Adding to 71224152 its reverse (25142217), we get a palindrome (96366369).

The spelling of 71224152 in words is "seventy-one million, two hundred twenty-four thousand, one hundred fifty-two".