71251330 has 32 divisors (see below), whose sum is σ = 139368960. Its totient is φ = 26127360.

The previous prime is 71251321. The next prime is 71251337. The reversal of 71251330 is 3315217.

It is not an unprimeable number, because it can be changed into a prime (71251337) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 159 + ... + 11938.

It is an arithmetic number, because the mean of its divisors is an integer number (4355280).

Almost surely, 2^71251330 is an apocalyptic number.

71251330 is a deficient number, since it is larger than the sum of its proper divisors (68117630).

71251330 is a wasteful number, since it uses less digits than its factorization.

71251330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12154.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 71251330 is about 8441.0502901002. The cubic root of 71251330 is about 414.5697966058.

Adding to 71251330 its reverse (3315217), we get a palindrome (74566547).

The spelling of 71251330 in words is "seventy-one million, two hundred fifty-one thousand, three hundred thirty".