53685215 has 4 divisors (see below), whose sum is σ = 64422264. Its totient is φ = 42948168.

The previous prime is 53685193. The next prime is 53685227. The reversal of 53685215 is 51258635.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53685215 - 2⁸ = 53684959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5368517 + ... + 5368526.

It is an arithmetic number, because the mean of its divisors is an integer number (16105566).

Almost surely, 2^53685215 is an apocalyptic number.

53685215 is a deficient number, since it is larger than the sum of its proper divisors (10737049).

53685215 is a wasteful number, since it uses less digits than its factorization.

53685215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10737048.

The product of its digits is 36000, while the sum is 35.

The square root of 53685215 is about 7327.0195168295. The cubic root of 53685215 is about 377.2404308911.

The spelling of 53685215 in words is "fifty-three million, six hundred eighty-five thousand, two hundred fifteen".