52551409 has 4 divisors (see below), whose sum is σ = 52668900. Its totient is φ = 52433920.

The previous prime is 52551377. The next prime is 52551413. The reversal of 52551409 is 90415525.

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 30835809 + 21715600 = 5553^2 + 4660^2 .

It is a cyclic number.

It is not a de Polignac number, because 52551409 - 2⁵ = 52551377 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52551469) 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, 58072 + ... + 58969.

It is an arithmetic number, because the mean of its divisors is an integer number (13167225).

Almost surely, 2^52551409 is an apocalyptic number.

It is an amenable number.

52551409 is a deficient number, since it is larger than the sum of its proper divisors (117491).

52551409 is a wasteful number, since it uses less digits than its factorization.

52551409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117490.

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 52551409 is about 7249.2350630946. The cubic root of 52551409 is about 374.5658002638.

The spelling of 52551409 in words is "fifty-two million, five hundred fifty-one thousand, four hundred nine".