53356217 has 4 divisors (see below), whose sum is σ = 56494836. Its totient is φ = 50217600.

The previous prime is 53356181. The next prime is 53356223. The reversal of 53356217 is 71265335.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71265335 = 5 ⋅14253067.

It can be written as a sum of positive squares in 2 ways, for example, as 17007376 + 36348841 = 4124^2 + 6029^2 .

It is a cyclic number.

It is not a de Polignac number, because 53356217 - 2¹⁶ = 53290681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53356267) 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, 1569284 + ... + 1569317.

It is an arithmetic number, because the mean of its divisors is an integer number (14123709).

Almost surely, 2^53356217 is an apocalyptic number.

It is an amenable number.

53356217 is a deficient number, since it is larger than the sum of its proper divisors (3138619).

53356217 is a wasteful number, since it uses less digits than its factorization.

53356217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3138618.

The product of its digits is 18900, while the sum is 32.

The square root of 53356217 is about 7304.5340029327. The cubic root of 53356217 is about 376.4682397415.

The spelling of 53356217 in words is "fifty-three million, three hundred fifty-six thousand, two hundred seventeen".