53501563 has 2 divisors, whose sum is σ = 53501564. Its totient is φ = 53501562.

The previous prime is 53501561. The next prime is 53501573. The reversal of 53501563 is 36510535.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53501563 - 2¹ = 53501561 is a prime.

Together with 53501561, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (53501561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26750781 + 26750782.

It is an arithmetic number, because the mean of its divisors is an integer number (26750782).

Almost surely, 2^53501563 is an apocalyptic number.

53501563 is a deficient number, since it is larger than the sum of its proper divisors (1).

53501563 is an equidigital number, since it uses as much as digits as its factorization.

53501563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6750, while the sum is 28.

The square root of 53501563 is about 7314.4762628639. The cubic root of 53501563 is about 376.8097715914.

The spelling of 53501563 in words is "fifty-three million, five hundred one thousand, five hundred sixty-three".