53750561 has 4 divisors (see below), whose sum is σ = 53799300. Its totient is φ = 53701824.

The previous prime is 53750539. The next prime is 53750579. The reversal of 53750561 is 16505735.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16505735 = 5 ⋅3301147.

It can be written as a sum of positive squares in 2 ways, for example, as 15062161 + 38688400 = 3881^2 + 6220^2 .

It is a cyclic number.

It is not a de Polignac number, because 53750561 - 2¹⁸ = 53488417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53750531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22676 + ... + 24933.

It is an arithmetic number, because the mean of its divisors is an integer number (13449825).

Almost surely, 2^53750561 is an apocalyptic number.

It is an amenable number.

53750561 is a deficient number, since it is larger than the sum of its proper divisors (48739).

53750561 is a wasteful number, since it uses less digits than its factorization.

53750561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48738.

The product of its (nonzero) digits is 15750, while the sum is 32.

The square root of 53750561 is about 7331.4774090902. The cubic root of 53750561 is about 377.3934286833.

The spelling of 53750561 in words is "fifty-three million, seven hundred fifty thousand, five hundred sixty-one".