61631271 has 12 divisors (see below), whose sum is σ = 95871048. Its totient is φ = 37926864.

The previous prime is 61631267. The next prime is 61631287. The reversal of 61631271 is 17213616.

61631271 is a `hidden beast` number, since 6 + 1 + 631 + 27 + 1 = 666.

It is not a de Polignac number, because 61631271 - 2² = 61631267 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61631291) 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, 263265 + ... + 263498.

It is an arithmetic number, because the mean of its divisors is an integer number (7989254).

Almost surely, 2^61631271 is an apocalyptic number.

61631271 is a deficient number, since it is larger than the sum of its proper divisors (34239777).

61631271 is a wasteful number, since it uses less digits than its factorization.

61631271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526782 (or 526779 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 61631271 is about 7850.5586425426. The cubic root of 61631271 is about 395.0029824055.

Adding to 61631271 its reverse (17213616), we get a palindrome (78844887).

The spelling of 61631271 in words is "sixty-one million, six hundred thirty-one thousand, two hundred seventy-one".