71545320 has 384 divisors, whose sum is σ = 303264000. Its totient is φ = 14192640.

The previous prime is 71545301. The next prime is 71545337. The reversal of 71545320 is 2354517.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 803836 + ... + 803924.

It is an arithmetic number, because the mean of its divisors is an integer number (789750).

Almost surely, 2^71545320 is an apocalyptic number.

71545320 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71545320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151632000).

71545320 is an abundant number, since it is smaller than the sum of its proper divisors (231718680).

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

71545320 is a wasteful number, since it uses less digits than its factorization.

71545320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 71545320 is about 8458.4466659074. The cubic root of 71545320 is about 415.1391994456.

Adding to 71545320 its reverse (2354517), we get a palindrome (73899837).

The spelling of 71545320 in words is "seventy-one million, five hundred forty-five thousand, three hundred twenty".