53918563 has 4 divisors (see below), whose sum is σ = 53954208. Its totient is φ = 53882920.

The previous prime is 53918551. The next prime is 53918573. The reversal of 53918563 is 36581935.

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 53918563 - 2¹⁷ = 53787491 is a prime.

It is a super-2 number, since 2×53918563² = 5814422871969938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53918573) 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, 15448 + ... + 18613.

It is an arithmetic number, because the mean of its divisors is an integer number (13488552).

Almost surely, 2^53918563 is an apocalyptic number.

53918563 is a deficient number, since it is larger than the sum of its proper divisors (35645).

53918563 is a wasteful number, since it uses less digits than its factorization.

53918563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35644.

The product of its digits is 97200, while the sum is 40.

The square root of 53918563 is about 7342.9260516500. The cubic root of 53918563 is about 377.7862116117.

The spelling of 53918563 in words is "fifty-three million, nine hundred eighteen thousand, five hundred sixty-three".