53661803 has 16 divisors (see below), whose sum is σ = 61414080. Its totient is φ = 46521216.

The previous prime is 53661793. The next prime is 53661847. The reversal of 53661803 is 30816635.

53661803 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 53661803 - 2⁴ = 53661787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53661803.

It is not an unprimeable number, because it can be changed into a prime (53661863) 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 15 ways as a sum of consecutive naturals, for example, 12026 + ... + 15872.

It is an arithmetic number, because the mean of its divisors is an integer number (3838380).

Almost surely, 2^53661803 is an apocalyptic number.

53661803 is a deficient number, since it is larger than the sum of its proper divisors (7752277).

53661803 is a wasteful number, since it uses less digits than its factorization.

53661803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3926.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 53661803 is about 7325.4216943463. The cubic root of 53661803 is about 377.1855850200.

The spelling of 53661803 in words is "fifty-three million, six hundred sixty-one thousand, eight hundred three".