51051181 has 4 divisors (see below), whose sum is σ = 51104412. Its totient is φ = 50997952.

The previous prime is 51051179. The next prime is 51051241. The reversal of 51051181 is 18115015.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34035556 + 17015625 = 5834^2 + 4125^2 .

It is a cyclic number.

It is not a de Polignac number, because 51051181 - 2¹ = 51051179 is a prime.

It is a super-2 number, since 2×51051181² = 5212446162989522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51081181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25150 + ... + 27103.

It is an arithmetic number, because the mean of its divisors is an integer number (12776103).

Almost surely, 2^51051181 is an apocalyptic number.

It is an amenable number.

51051181 is a deficient number, since it is larger than the sum of its proper divisors (53231).

51051181 is an equidigital number, since it uses as much as digits as its factorization.

51051181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53230.

The product of its (nonzero) digits is 200, while the sum is 22.

The square root of 51051181 is about 7145.0109167166. The cubic root of 51051181 is about 370.9669884873.

Adding to 51051181 its reverse (18115015), we get a palindrome (69166196).

The spelling of 51051181 in words is "fifty-one million, fifty-one thousand, one hundred eighty-one".