53863519 has 4 divisors (see below), whose sum is σ = 54776520. Its totient is φ = 52950520.

The previous prime is 53863507. The next prime is 53863547. The reversal of 53863519 is 91536835.

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 53863519 - 2²³ = 45474911 is a prime.

It is a super-2 number, since 2×53863519² = 5802557358126722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53863559) 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, 456412 + ... + 456529.

It is an arithmetic number, because the mean of its divisors is an integer number (13694130).

Almost surely, 2^53863519 is an apocalyptic number.

53863519 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

53863519 is a deficient number, since it is larger than the sum of its proper divisors (913001).

53863519 is an equidigital number, since it uses as much as digits as its factorization.

53863519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 913000.

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

The square root of 53863519 is about 7339.1769974569. The cubic root of 53863519 is about 377.6576106043.

The spelling of 53863519 in words is "fifty-three million, eight hundred sixty-three thousand, five hundred nineteen".