71571252 has 24 divisors (see below), whose sum is σ = 175789600. Its totient is φ = 22601376.

The previous prime is 71571251. The next prime is 71571259. The reversal of 71571252 is 25217517.

It is a super-2 number, since 2×71571252² = 10244888225695008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71571251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 156727 + ... + 157182.

Almost surely, 2^71571252 is an apocalyptic number.

It is an amenable number.

71571252 is an abundant number, since it is smaller than the sum of its proper divisors (104218348).

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

71571252 is a wasteful number, since it uses less digits than its factorization.

71571252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313935 (or 313933 counting only the distinct ones).

The product of its digits is 4900, while the sum is 30.

The square root of 71571252 is about 8459.9794325991. The cubic root of 71571252 is about 415.1893498926.

Adding to 71571252 its reverse (25217517), we get a palindrome (96788769).

The spelling of 71571252 in words is "seventy-one million, five hundred seventy-one thousand, two hundred fifty-two".