61871133 has 16 divisors (see below), whose sum is σ = 85377536. Its totient is φ = 39813120.

The previous prime is 61871119. The next prime is 61871167. The reversal of 61871133 is 33117816.

It is not a de Polignac number, because 61871133 - 2⁵ = 61871101 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61871133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61871113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53085 + ... + 54237.

It is an arithmetic number, because the mean of its divisors is an integer number (5336096).

Almost surely, 2^61871133 is an apocalyptic number.

It is an amenable number.

61871133 is a deficient number, since it is larger than the sum of its proper divisors (23506403).

61871133 is a wasteful number, since it uses less digits than its factorization.

61871133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1764.

The product of its digits is 3024, while the sum is 30.

The square root of 61871133 is about 7865.8205547800. The cubic root of 61871133 is about 395.5147548387.

Adding to 61871133 its reverse (33117816), we get a palindrome (94988949).

The spelling of 61871133 in words is "sixty-one million, eight hundred seventy-one thousand, one hundred thirty-three".