53391385 has 4 divisors (see below), whose sum is σ = 64069668. Its totient is φ = 42713104.

The previous prime is 53391383. The next prime is 53391391. The reversal of 53391385 is 58319335.

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 26132544 + 27258841 = 5112^2 + 5221^2 .

It is a cyclic number.

It is not a de Polignac number, because 53391385 - 2¹ = 53391383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53391383) 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, 5339134 + ... + 5339143.

It is an arithmetic number, because the mean of its divisors is an integer number (16017417).

Almost surely, 2^53391385 is an apocalyptic number.

It is an amenable number.

53391385 is a deficient number, since it is larger than the sum of its proper divisors (10678283).

53391385 is a wasteful number, since it uses less digits than its factorization.

53391385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10678282.

The product of its digits is 48600, while the sum is 37.

The square root of 53391385 is about 7306.9408783704. The cubic root of 53391385 is about 376.5509338057.

It can be divided in two parts, 5339 and 1385, that added together give a square (6724 = 82²).

The spelling of 53391385 in words is "fifty-three million, three hundred ninety-one thousand, three hundred eighty-five".