53903215 has 4 divisors (see below), whose sum is σ = 64683864. Its totient is φ = 43122568.

The previous prime is 53903207. The next prime is 53903221. The reversal of 53903215 is 51230935.

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 53903215 - 2³ = 53903207 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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5390317 + ... + 5390326.

It is an arithmetic number, because the mean of its divisors is an integer number (16170966).

Almost surely, 2^53903215 is an apocalyptic number.

53903215 is a deficient number, since it is larger than the sum of its proper divisors (10780649).

53903215 is a wasteful number, since it uses less digits than its factorization.

53903215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10780648.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 53903215 is about 7341.8808897993. The cubic root of 53903215 is about 377.7503624056.

The spelling of 53903215 in words is "fifty-three million, nine hundred three thousand, two hundred fifteen".