51463409 has 4 divisors (see below), whose sum is σ = 51684516. Its totient is φ = 51242304.

The previous prime is 51463393. The next prime is 51463417. The reversal of 51463409 is 90436415.

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 32947600 + 18515809 = 5740^2 + 4303^2 .

It is a cyclic number.

It is not a de Polignac number, because 51463409 - 2⁴ = 51463393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51463459) 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, 110204 + ... + 110669.

It is an arithmetic number, because the mean of its divisors is an integer number (12921129).

Almost surely, 2^51463409 is an apocalyptic number.

It is an amenable number.

51463409 is a deficient number, since it is larger than the sum of its proper divisors (221107).

51463409 is a wasteful number, since it uses less digits than its factorization.

51463409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221106.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 51463409 is about 7173.8001784271. The cubic root of 51463409 is about 371.9628074929.

The spelling of 51463409 in words is "fifty-one million, four hundred sixty-three thousand, four hundred nine".