71036220 has 48 divisors (see below), whose sum is σ = 200194848. Its totient is φ = 18819840.

The previous prime is 71036209. The next prime is 71036233. The reversal of 71036220 is 2263017.

It is a happy number.

It is a super-2 number, since 2×71036220² = 10092289103776800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5650 + ... + 13190.

It is an arithmetic number, because the mean of its divisors is an integer number (4170726).

Almost surely, 2^71036220 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 71036220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100097424).

71036220 is an abundant number, since it is smaller than the sum of its proper divisors (129158628).

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

71036220 is a wasteful number, since it uses less digits than its factorization.

71036220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7710 (or 7708 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 71036220 is about 8428.2987607227. The cubic root of 71036220 is about 414.1521763143.

Adding to 71036220 its reverse (2263017), we get a palindrome (73299237).

The spelling of 71036220 in words is "seventy-one million, thirty-six thousand, two hundred twenty".