53813815 has 16 divisors (see below), whose sum is σ = 71780256. Its totient is φ = 38396800.

The previous prime is 53813807. The next prime is 53813819. The reversal of 53813815 is 51831835.

53813815 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53813815 - 2³ = 53813807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53813819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6316 + ... + 12145.

It is an arithmetic number, because the mean of its divisors is an integer number (4486266).

Almost surely, 2^53813815 is an apocalyptic number.

53813815 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

53813815 is a deficient number, since it is larger than the sum of its proper divisors (17966441).

53813815 is a wasteful number, since it uses less digits than its factorization.

53813815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18530.

The product of its digits is 14400, while the sum is 34.

The square root of 53813815 is about 7335.7900051733. The cubic root of 53813815 is about 377.5414103075.

The spelling of 53813815 in words is "fifty-three million, eight hundred thirteen thousand, eight hundred fifteen".