71500212 has 144 divisors (see below), whose sum is σ = 220248000. Its totient is φ = 19994688.

The previous prime is 71500201. The next prime is 71500217. The reversal of 71500212 is 21200517.

It is a super-2 number, since 2×71500212² = 10224560632089888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71500217) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 312114 + ... + 312342.

It is an arithmetic number, because the mean of its divisors is an integer number (1529500).

Almost surely, 2^71500212 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 71500212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110124000).

71500212 is an abundant number, since it is smaller than the sum of its proper divisors (148747788).

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

71500212 is a wasteful number, since it uses less digits than its factorization.

71500212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 18.

The square root of 71500212 is about 8455.7797984574. The cubic root of 71500212 is about 415.0519352432.

Adding to 71500212 its reverse (21200517), we get a palindrome (92700729).

The spelling of 71500212 in words is "seventy-one million, five hundred thousand, two hundred twelve".