51546161 has 4 divisors (see below), whose sum is σ = 51561972. Its totient is φ = 51530352.

The previous prime is 51546133. The next prime is 51546163. The reversal of 51546161 is 16164515.

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 2825761 + 48720400 = 1681^2 + 6980^2 .

It is a cyclic number.

It is not a de Polignac number, because 51546161 - 2¹⁸ = 51284017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51546163) 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, 1010 + ... + 10203.

It is an arithmetic number, because the mean of its divisors is an integer number (12890493).

Almost surely, 2^51546161 is an apocalyptic number.

It is an amenable number.

51546161 is a deficient number, since it is larger than the sum of its proper divisors (15811).

51546161 is a wasteful number, since it uses less digits than its factorization.

51546161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15810.

The product of its digits is 3600, while the sum is 29.

The square root of 51546161 is about 7179.5655161019. The cubic root of 51546161 is about 372.1620699939.

The spelling of 51546161 in words is "fifty-one million, five hundred forty-six thousand, one hundred sixty-one".