71207172 has 36 divisors (see below), whose sum is σ = 187824000. Its totient is φ = 22703472.

The previous prime is 71207167. The next prime is 71207173. The reversal of 71207172 is 27170217.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×71207172² = 10140922688475168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71207173) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42172 + ... + 43827.

Almost surely, 2^71207172 is an apocalyptic number.

It is an amenable number.

71207172 is an abundant number, since it is smaller than the sum of its proper divisors (116616828).

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

71207172 is a wasteful number, since it uses less digits than its factorization.

71207172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86032 (or 86027 counting only the distinct ones).

The product of its (nonzero) digits is 1372, while the sum is 27.

The square root of 71207172 is about 8438.4342149477. The cubic root of 71207172 is about 414.4841357196.

Adding to 71207172 its reverse (27170217), we get a palindrome (98377389).

The spelling of 71207172 in words is "seventy-one million, two hundred seven thousand, one hundred seventy-two".