71215700 has 18 divisors (see below), whose sum is σ = 154538286. Its totient is φ = 28486240.

The previous prime is 71215699. The next prime is 71215747. The reversal of 71215700 is 751217.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2226064 + 68989636 = 1492^2 + 8306^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 355979 + ... + 356178.

Almost surely, 2^71215700 is an apocalyptic number.

It is an amenable number.

71215700 is an abundant number, since it is smaller than the sum of its proper divisors (83322586).

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

71215700 is a wasteful number, since it uses less digits than its factorization.

71215700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712171 (or 712164 counting only the distinct ones).

The product of its (nonzero) digits is 490, while the sum is 23.

The square root of 71215700 is about 8438.9395068338. The cubic root of 71215700 is about 414.5006817102.

Adding to 71215700 its reverse (751217), we get a palindrome (71966917).

It can be divided in two parts, 7121 and 5700, that added together give a palindrome (12821).

The spelling of 71215700 in words is "seventy-one million, two hundred fifteen thousand, seven hundred".