71550212 has 24 divisors (see below), whose sum is σ = 135086616. Its totient is φ = 33033728.

The previous prime is 71550211. The next prime is 71550239. The reversal of 71550212 is 21205517.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14638276 + 56911936 = 3826^2 + 7544^2 .

It is not an unprimeable number, because it can be changed into a prime (71550211) 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, 6323 + ... + 13530.

It is an arithmetic number, because the mean of its divisors is an integer number (5628609).

Almost surely, 2^71550212 is an apocalyptic number.

It is an amenable number.

71550212 is a deficient number, since it is larger than the sum of its proper divisors (63536404).

71550212 is a wasteful number, since it uses less digits than its factorization.

71550212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19927 (or 19925 counting only the distinct ones).

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

The square root of 71550212 is about 8458.7358393557. The cubic root of 71550212 is about 415.1486611159.

Adding to 71550212 its reverse (21205517), we get a palindrome (92755729).

The spelling of 71550212 in words is "seventy-one million, five hundred fifty thousand, two hundred twelve".