71552152 has 48 divisors (see below), whose sum is σ = 157142160. Its totient is φ = 30453696.

The previous prime is 71552111. The next prime is 71552161. The reversal of 71552152 is 25125517.

It is a super-2 number, since 2×71552152² = 10239420911662208, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 71552152.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64918 + ... + 66010.

It is an arithmetic number, because the mean of its divisors is an integer number (3273795).

Almost surely, 2^71552152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71552152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78571080).

71552152 is an abundant number, since it is smaller than the sum of its proper divisors (85590008).

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

71552152 is a wasteful number, since it uses less digits than its factorization.

71552152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280 (or 1269 counting only the distinct ones).

The product of its digits is 3500, while the sum is 28.

The square root of 71552152 is about 8458.8505129243. The cubic root of 71552152 is about 415.1524131715.

Adding to 71552152 its reverse (25125517), we get a palindrome (96677669).

The spelling of 71552152 in words is "seventy-one million, five hundred fifty-two thousand, one hundred fifty-two".