53685881 has 4 divisors (see below), whose sum is σ = 56843892. Its totient is φ = 50527872.

The previous prime is 53685871. The next prime is 53685889. The reversal of 53685881 is 18858635.

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 36711481 + 16974400 = 6059^2 + 4120^2 .

It is a cyclic number.

It is not a de Polignac number, because 53685881 - 2⁶ = 53685817 is a prime.

It is a super-2 number, since 2×53685881² = 5764347637492322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53685889) 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, 1578980 + ... + 1579013.

It is an arithmetic number, because the mean of its divisors is an integer number (14210973).

Almost surely, 2^53685881 is an apocalyptic number.

It is an amenable number.

53685881 is a deficient number, since it is larger than the sum of its proper divisors (3158011).

53685881 is a wasteful number, since it uses less digits than its factorization.

53685881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3158010.

The product of its digits is 230400, while the sum is 44.

The square root of 53685881 is about 7327.0649649092. The cubic root of 53685881 is about 377.2419908556.

The spelling of 53685881 in words is "fifty-three million, six hundred eighty-five thousand, eight hundred eighty-one".