51451161 has 16 divisors (see below), whose sum is σ = 72251520. Its totient is φ = 32503680.

The previous prime is 51451159. The next prime is 51451217. The reversal of 51451161 is 16115415.

It is not a de Polignac number, because 51451161 - 2¹ = 51451159 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51451111) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4101 + ... + 10941.

It is an arithmetic number, because the mean of its divisors is an integer number (4515720).

Almost surely, 2^51451161 is an apocalyptic number.

It is an amenable number.

51451161 is a deficient number, since it is larger than the sum of its proper divisors (20800359).

51451161 is a wasteful number, since it uses less digits than its factorization.

51451161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6976.

The product of its digits is 600, while the sum is 24.

The square root of 51451161 is about 7172.9464657141. The cubic root of 51451161 is about 371.9332968042.

Adding to 51451161 its reverse (16115415), we get a palindrome (67566576).

The spelling of 51451161 in words is "fifty-one million, four hundred fifty-one thousand, one hundred sixty-one".