53561817 has 32 divisors (see below), whose sum is σ = 84624000. Its totient is φ = 33802272.

The previous prime is 53561803. The next prime is 53561821. The reversal of 53561817 is 71816535.

53561817 is a `hidden beast` number, since 5 + 35 + 618 + 1 + 7 = 666.

53561817 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 53561817 - 2¹⁴ = 53545433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53561317) 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 31 ways as a sum of consecutive naturals, for example, 40909 + ... + 42197.

It is an arithmetic number, because the mean of its divisors is an integer number (2644500).

Almost surely, 2^53561817 is an apocalyptic number.

53561817 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

It is an amenable number.

53561817 is a deficient number, since it is larger than the sum of its proper divisors (31062183).

53561817 is an equidigital number, since it uses as much as digits as its factorization.

53561817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329 (or 1311 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 53561817 is about 7318.5939223323. The cubic root of 53561817 is about 376.9511741771.

The spelling of 53561817 in words is "fifty-three million, five hundred sixty-one thousand, eight hundred seventeen".