71155212 has 48 divisors (see below), whose sum is σ = 173107200. Its totient is φ = 22720320.

The previous prime is 71155211. The next prime is 71155267. The reversal of 71155212 is 21255117.

It is not an unprimeable number, because it can be changed into a prime (71155211) 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, 47637 + ... + 49107.

It is an arithmetic number, because the mean of its divisors is an integer number (3606400).

Almost surely, 2^71155212 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 71155212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86553600).

71155212 is an abundant number, since it is smaller than the sum of its proper divisors (101951988).

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

71155212 is a wasteful number, since it uses less digits than its factorization.

71155212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646 (or 1644 counting only the distinct ones).

The product of its digits is 700, while the sum is 24.

The square root of 71155212 is about 8435.3548828724. The cubic root of 71155212 is about 414.3832945841.

The spelling of 71155212 in words is "seventy-one million, one hundred fifty-five thousand, two hundred twelve".