71506212 has 48 divisors (see below), whose sum is σ = 173236224. Its totient is φ = 22932000.

The previous prime is 71506189. The next prime is 71506217. The reversal of 71506212 is 21260517.

It is a super-2 number, since 2×71506212² = 10226276709177888, which contains 22 as substring.

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (71506217) 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, 78037 + ... + 78947.

It is an arithmetic number, because the mean of its divisors is an integer number (3609088).

Almost surely, 2^71506212 is an apocalyptic number.

It is an amenable number.

71506212 is an abundant number, since it is smaller than the sum of its proper divisors (101730012).

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

71506212 is a wasteful number, since it uses less digits than its factorization.

71506212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160 (or 1158 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 71506212 is about 8456.1345779263. The cubic root of 71506212 is about 415.0635447283.

Adding to 71506212 its reverse (21260517), we get a palindrome (92766729).

The spelling of 71506212 in words is "seventy-one million, five hundred six thousand, two hundred twelve".