71631252 has 72 divisors (see below), whose sum is σ = 225755712. Its totient is φ = 18604800.

The previous prime is 71631239. The next prime is 71631253. The reversal of 71631252 is 25213617.

It is a happy number.

71631252 is a `hidden beast` number, since 7 + 1 + 631 + 25 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71631253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10149 + ... + 15692.

It is an arithmetic number, because the mean of its divisors is an integer number (3135496).

Almost surely, 2^71631252 is an apocalyptic number.

It is an amenable number.

71631252 is an abundant number, since it is smaller than the sum of its proper divisors (154124460).

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

71631252 is a wasteful number, since it uses less digits than its factorization.

71631252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25869 (or 25864 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 71631252 is about 8463.5247976242. The cubic root of 71631252 is about 415.3053387487.

Adding to 71631252 its reverse (25213617), we get a palindrome (96844869).

The spelling of 71631252 in words is "seventy-one million, six hundred thirty-one thousand, two hundred fifty-two".