53818313 has 4 divisors (see below), whose sum is σ = 55272900. Its totient is φ = 52363728.

The previous prime is 53818309. The next prime is 53818333. The reversal of 53818313 is 31381835.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24571849 + 29246464 = 4957^2 + 5408^2 .

It is a cyclic number.

It is not a de Polignac number, because 53818313 - 2² = 53818309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 53818313.

It is not an unprimeable number, because it can be changed into a prime (53818333) 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, 727238 + ... + 727311.

It is an arithmetic number, because the mean of its divisors is an integer number (13818225).

Almost surely, 2^53818313 is an apocalyptic number.

It is an amenable number.

53818313 is a deficient number, since it is larger than the sum of its proper divisors (1454587).

53818313 is a wasteful number, since it uses less digits than its factorization.

53818313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454586.

The product of its digits is 8640, while the sum is 32.

The square root of 53818313 is about 7336.0965778812. The cubic root of 53818313 is about 377.5519288825.

The spelling of 53818313 in words is "fifty-three million, eight hundred eighteen thousand, three hundred thirteen".