71313270 has 128 divisors (see below), whose sum is σ = 209986560. Its totient is φ = 15137280.

The previous prime is 71313269. The next prime is 71313293. The reversal of 71313270 is 7231317.

It is a self number, because there is not a number n which added to its sum of digits gives 71313270.

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 63 ways as a sum of consecutive naturals, for example, 243244 + ... + 243536.

It is an arithmetic number, because the mean of its divisors is an integer number (1640520).

Almost surely, 2^71313270 is an apocalyptic number.

71313270 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 71313270, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104993280).

71313270 is an abundant number, since it is smaller than the sum of its proper divisors (138673290).

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

71313270 is a wasteful number, since it uses less digits than its factorization.

71313270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390.

The product of its (nonzero) digits is 882, while the sum is 24.

The square root of 71313270 is about 8444.7184677762. The cubic root of 71313270 is about 414.6898926839.

Adding to 71313270 its reverse (7231317), we get a palindrome (78544587).

It can be divided in two parts, 7131 and 3270, that added together give a palindrome (10401).

The spelling of 71313270 in words is "seventy-one million, three hundred thirteen thousand, two hundred seventy".