51661141 has 6 divisors (see below), whose sum is σ = 60095670. Its totient is φ = 44280936.

The previous prime is 51661123. The next prime is 51661153. The reversal of 51661141 is 14116615.

It can be written as a sum of positive squares in only one way, i.e., 46580625 + 5080516 = 6825^2 + 2254^2 .

It is not a de Polignac number, because 51661141 - 2¹¹ = 51659093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51661241) 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 5 ways as a sum of consecutive naturals, for example, 527106 + ... + 527203.

It is an arithmetic number, because the mean of its divisors is an integer number (10015945).

Almost surely, 2^51661141 is an apocalyptic number.

It is an amenable number.

51661141 is a deficient number, since it is larger than the sum of its proper divisors (8434529).

51661141 is a wasteful number, since it uses less digits than its factorization.

51661141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054323 (or 1054316 counting only the distinct ones).

The product of its digits is 720, while the sum is 25.

The square root of 51661141 is about 7187.5685040214. The cubic root of 51661141 is about 372.4385821296.

Adding to 51661141 its reverse (14116615), we get a palindrome (65777756).

The spelling of 51661141 in words is "fifty-one million, six hundred sixty-one thousand, one hundred forty-one".