51861141 has 10 divisors (see below), whose sum is σ = 77471702. Its totient is φ = 34574040.

The previous prime is 51861119. The next prime is 51861157. The reversal of 51861141 is 14116815.

51861141 is a `hidden beast` number, since 5 + 1 + 8 + 611 + 41 = 666.

It can be written as a sum of positive squares in only one way, i.e., 40832100 + 11029041 = 6390^2 + 3321^2 .

It is a de Polignac number, because none of the positive numbers 2^k-51861141 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51860141) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 320050 + ... + 320211.

Almost surely, 2^51861141 is an apocalyptic number.

It is an amenable number.

51861141 is a deficient number, since it is larger than the sum of its proper divisors (25610561).

51861141 is an equidigital number, since it uses as much as digits as its factorization.

51861141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640273 (or 640264 counting only the distinct ones).

The product of its digits is 960, while the sum is 27.

The square root of 51861141 is about 7201.4679753506. The cubic root of 51861141 is about 372.9185805560.

Adding to 51861141 its reverse (14116815), we get a palindrome (65977956).

The spelling of 51861141 in words is "fifty-one million, eight hundred sixty-one thousand, one hundred forty-one".