53216765 has 16 divisors (see below), whose sum is σ = 73232640. Its totient is φ = 36366720.

The previous prime is 53216759. The next prime is 53216789. The reversal of 53216765 is 56761235.

It is not a de Polignac number, because 53216765 - 2⁸ = 53216509 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8441 + ... + 13329.

It is an arithmetic number, because the mean of its divisors is an integer number (4577040).

Almost surely, 2^53216765 is an apocalyptic number.

It is an amenable number.

53216765 is a deficient number, since it is larger than the sum of its proper divisors (20015875).

53216765 is a wasteful number, since it uses less digits than its factorization.

53216765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5212.

The product of its digits is 37800, while the sum is 35.

The square root of 53216765 is about 7294.9821795533. The cubic root of 53216765 is about 376.1399740094.

The spelling of 53216765 in words is "fifty-three million, two hundred sixteen thousand, seven hundred sixty-five".