71163020 has 48 divisors (see below), whose sum is σ = 158977728. Its totient is φ = 26664960.

The previous prime is 71163019. The next prime is 71163023. The reversal of 71163020 is 2036117.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 71162983 and 71163001.

It is not an unprimeable number, because it can be changed into a prime (71163023) 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, 105404 + ... + 106076.

It is an arithmetic number, because the mean of its divisors is an integer number (3312036).

Almost surely, 2^71163020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 71163020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79488864).

71163020 is an abundant number, since it is smaller than the sum of its proper divisors (87814708).

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

71163020 is a wasteful number, since it uses less digits than its factorization.

71163020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1010 (or 1008 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 71163020 is about 8435.8176841371. The cubic root of 71163020 is about 414.3984510583.

Adding to 71163020 its reverse (2036117), we get a palindrome (73199137).

The spelling of 71163020 in words is "seventy-one million, one hundred sixty-three thousand, twenty".