53306217 has 6 divisors (see below), whose sum is σ = 76997882. Its totient is φ = 35537472.

The previous prime is 53306213. The next prime is 53306243. The reversal of 53306217 is 71260335.

It is a happy number.

53306217 is a `hidden beast` number, since 5 + 3 + 30 + 621 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 52838361 + 467856 = 7269^2 + 684^2 .

It is not a de Polignac number, because 53306217 - 2² = 53306213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53306213) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2961448 + ... + 2961465.

Almost surely, 2^53306217 is an apocalyptic number.

It is an amenable number.

53306217 is a deficient number, since it is larger than the sum of its proper divisors (23691665).

53306217 is a wasteful number, since it uses less digits than its factorization.

53306217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5922919 (or 5922916 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 53306217 is about 7301.1106689325. The cubic root of 53306217 is about 376.3506071212.

The spelling of 53306217 in words is "fifty-three million, three hundred six thousand, two hundred seventeen".