71534220 has 48 divisors (see below), whose sum is σ = 200981088. Its totient is φ = 19010560.

The previous prime is 71534219. The next prime is 71534227. The reversal of 71534220 is 2243517.

It is not an unprimeable number, because it can be changed into a prime (71534227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17140 + ... + 20900.

It is an arithmetic number, because the mean of its divisors is an integer number (4187106).

Almost surely, 2^71534220 is an apocalyptic number.

It is an amenable number.

71534220 is an abundant number, since it is smaller than the sum of its proper divisors (129446868).

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

71534220 is a wasteful number, since it uses less digits than its factorization.

71534220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4090 (or 4088 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 71534220 is about 8457.7904916119. The cubic root of 71534220 is about 415.1177292156.

Adding to 71534220 its reverse (2243517), we get a palindrome (73777737).

The spelling of 71534220 in words is "seventy-one million, five hundred thirty-four thousand, two hundred twenty".