71223552 has 108 divisors (see below), whose sum is σ = 216296080. Its totient is φ = 22477824.

The previous prime is 71223547. The next prime is 71223553. The reversal of 71223552 is 25532217.

It is not an unprimeable number, because it can be changed into a prime (71223553) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42963 + ... + 44589.

Almost surely, 2^71223552 is an apocalyptic number.

71223552 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71223552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108148040).

71223552 is an abundant number, since it is smaller than the sum of its proper divisors (145072528).

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

71223552 is a wasteful number, since it uses less digits than its factorization.

71223552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1668 (or 1651 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 71223552 is about 8439.4047183436. The cubic root of 71223552 is about 414.5159149605.

Adding to 71223552 its reverse (25532217), we get a palindrome (96755769).

The spelling of 71223552 in words is "seventy-one million, two hundred twenty-three thousand, five hundred fifty-two".