51860161 has 2 divisors, whose sum is σ = 51860162. Its totient is φ = 51860160.

The previous prime is 51860153. The next prime is 51860189. The reversal of 51860161 is 16106815.

It is an a-pointer prime, because the next prime (51860189) can be obtained adding 51860161 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43560000 + 8300161 = 6600^2 + 2881^2 .

It is a cyclic number.

It is not a de Polignac number, because 51860161 - 2³ = 51860153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51860111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25930080 + 25930081.

It is an arithmetic number, because the mean of its divisors is an integer number (25930081).

Almost surely, 2^51860161 is an apocalyptic number.

It is an amenable number.

51860161 is a deficient number, since it is larger than the sum of its proper divisors (1).

51860161 is an equidigital number, since it uses as much as digits as its factorization.

51860161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 51860161 is about 7201.3999333463. The cubic root of 51860161 is about 372.9162315750.

Adding to 51860161 its reverse (16106815), we get a palindrome (67966976).

The spelling of 51860161 in words is "fifty-one million, eight hundred sixty thousand, one hundred sixty-one".