53818815 has 16 divisors (see below), whose sum is σ = 86662368. Its totient is φ = 28519296.

The previous prime is 53818813. The next prime is 53818819. The reversal of 53818815 is 51881835.

It is not a de Polignac number, because 53818815 - 2¹ = 53818813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53818813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9072 + ... + 13781.

It is an arithmetic number, because the mean of its divisors is an integer number (5416398).

Almost surely, 2^53818815 is an apocalyptic number.

53818815 is a deficient number, since it is larger than the sum of its proper divisors (32843553).

53818815 is a wasteful number, since it uses less digits than its factorization.

53818815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23018.

The product of its digits is 38400, while the sum is 39.

The square root of 53818815 is about 7336.1307921819. The cubic root of 53818815 is about 377.5531027734.

It can be divided in two parts, 538188 and 15, that added together give a triangular number (538203 = T₁₀₃₇).

The spelling of 53818815 in words is "fifty-three million, eight hundred eighteen thousand, eight hundred fifteen".