53643505 has 16 divisors (see below), whose sum is σ = 65291904. Its totient is φ = 42307200.

The previous prime is 53643493. The next prime is 53643509. The reversal of 53643505 is 50534635.

It is not a de Polignac number, because 53643505 - 2⁹ = 53642993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53643509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 171229 + ... + 171541.

It is an arithmetic number, because the mean of its divisors is an integer number (4080744).

Almost surely, 2^53643505 is an apocalyptic number.

It is an amenable number.

53643505 is a deficient number, since it is larger than the sum of its proper divisors (11648399).

53643505 is a wasteful number, since it uses less digits than its factorization.

53643505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696.

The product of its (nonzero) digits is 27000, while the sum is 31.

The square root of 53643505 is about 7324.1726495216. The cubic root of 53643505 is about 377.1427082991.

The spelling of 53643505 in words is "fifty-three million, six hundred forty-three thousand, five hundred five".