51446161 has 4 divisors (see below), whose sum is σ = 55403572. Its totient is φ = 47488752.

The previous prime is 51446159. The next prime is 51446179. The reversal of 51446161 is 16164415.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16164415 = 5 ⋅3232883.

It can be written as a sum of positive squares in 2 ways, for example, as 26884225 + 24561936 = 5185^2 + 4956^2 .

It is a cyclic number.

It is not a de Polignac number, because 51446161 - 2¹ = 51446159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51446861) 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, 1978686 + ... + 1978711.

It is an arithmetic number, because the mean of its divisors is an integer number (13850893).

Almost surely, 2^51446161 is an apocalyptic number.

It is an amenable number.

51446161 is a deficient number, since it is larger than the sum of its proper divisors (3957411).

51446161 is a wasteful number, since it uses less digits than its factorization.

51446161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3957410.

The product of its digits is 2880, while the sum is 28.

The square root of 51446161 is about 7172.5979254382. The cubic root of 51446161 is about 371.9212483121.

The spelling of 51446161 in words is "fifty-one million, four hundred forty-six thousand, one hundred sixty-one".