51467561 has 4 divisors (see below), whose sum is σ = 54176400. Its totient is φ = 48758724.

The previous prime is 51467527. The next prime is 51467567. The reversal of 51467561 is 16576415.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16576415 = 5 ⋅3315283.

It is a cyclic number.

It is not a de Polignac number, because 51467561 - 2¹⁸ = 51205417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51467567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1354391 + ... + 1354428.

It is an arithmetic number, because the mean of its divisors is an integer number (13544100).

Almost surely, 2^51467561 is an apocalyptic number.

It is an amenable number.

51467561 is a deficient number, since it is larger than the sum of its proper divisors (2708839).

51467561 is a wasteful number, since it uses less digits than its factorization.

51467561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2708838.

The product of its digits is 25200, while the sum is 35.

The square root of 51467561 is about 7174.0895589615. The cubic root of 51467561 is about 371.9728103803.

The spelling of 51467561 in words is "fifty-one million, four hundred sixty-seven thousand, five hundred sixty-one".