71521122 has 32 divisors (see below), whose sum is σ = 152451072. Its totient is φ = 22316624.

The previous prime is 71521103. The next prime is 71521127. The reversal of 71521122 is 22112517.

It is not an unprimeable number, because it can be changed into a prime (71521127) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 973 + ... + 11999.

It is an arithmetic number, because the mean of its divisors is an integer number (4764096).

Almost surely, 2^71521122 is an apocalyptic number.

71521122 is an abundant number, since it is smaller than the sum of its proper divisors (80929950).

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

71521122 is a wasteful number, since it uses less digits than its factorization.

71521122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11102.

The product of its digits is 280, while the sum is 21.

The square root of 71521122 is about 8457.0161404599. The cubic root of 71521122 is about 415.0923914872.

Adding to 71521122 its reverse (22112517), we get a palindrome (93633639).

The spelling of 71521122 in words is "seventy-one million, five hundred twenty-one thousand, one hundred twenty-two".