54021563 has 4 divisors (see below), whose sum is σ = 57199320. Its totient is φ = 50843808.

The previous prime is 54021553. The next prime is 54021581. The reversal of 54021563 is 36512045.

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 54021563 - 2¹⁰ = 54020539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54021553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1588853 + ... + 1588886.

It is an arithmetic number, because the mean of its divisors is an integer number (14299830).

Almost surely, 2^54021563 is an apocalyptic number.

54021563 is a deficient number, since it is larger than the sum of its proper divisors (3177757).

54021563 is a wasteful number, since it uses less digits than its factorization.

54021563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3177756.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 54021563 is about 7349.9362582270. The cubic root of 54021563 is about 378.0266187874.

The spelling of 54021563 in words is "fifty-four million, twenty-one thousand, five hundred sixty-three".