71552012 has 12 divisors (see below), whose sum is σ = 143104080. Its totient is φ = 30665136.

The previous prime is 71552009. The next prime is 71552017. The reversal of 71552012 is 21025517.

It is a happy number.

71552012 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (71552017) 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, 1277687 + ... + 1277742.

It is an arithmetic number, because the mean of its divisors is an integer number (11925340).

Almost surely, 2^71552012 is an apocalyptic number.

It is an amenable number.

71552012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

71552012 is a wasteful number, since it uses less digits than its factorization.

71552012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2555440 (or 2555438 counting only the distinct ones).

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 71552012 is about 8458.8422375642. The cubic root of 71552012 is about 415.1521424069.

Adding to 71552012 its reverse (21025517), we get a palindrome (92577529).

The spelling of 71552012 in words is "seventy-one million, five hundred fifty-two thousand, twelve".