53256209 has 8 divisors (see below), whose sum is σ = 56582760. Its totient is φ = 50029056.

The previous prime is 53256199. The next prime is 53256251. The reversal of 53256209 is 90265235.

It can be written as a sum of positive squares in 4 ways, for example, as 11937025 + 41319184 = 3455^2 + 6428^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53256209 - 2⁴ = 53256193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53256289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23744 + ... + 25889.

It is an arithmetic number, because the mean of its divisors is an integer number (7072845).

Almost surely, 2^53256209 is an apocalyptic number.

It is an amenable number.

53256209 is a deficient number, since it is larger than the sum of its proper divisors (3326551).

53256209 is a wasteful number, since it uses less digits than its factorization.

53256209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49699.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 53256209 is about 7297.6851809324. The cubic root of 53256209 is about 376.2328820812.

The spelling of 53256209 in words is "fifty-three million, two hundred fifty-six thousand, two hundred nine".