53903561 has 8 divisors (see below), whose sum is σ = 56712264. Its totient is φ = 51166080.

The previous prime is 53903557. The next prime is 53903567. The reversal of 53903561 is 16530935.

It can be written as a sum of positive squares in 4 ways, for example, as 160000 + 53743561 = 400^2 + 7331^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53903561 - 2² = 53903557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53903567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16250 + ... + 19283.

It is an arithmetic number, because the mean of its divisors is an integer number (7089033).

Almost surely, 2^53903561 is an apocalyptic number.

It is an amenable number.

53903561 is a deficient number, since it is larger than the sum of its proper divisors (2808703).

53903561 is a wasteful number, since it uses less digits than its factorization.

53903561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35611.

The product of its (nonzero) digits is 12150, while the sum is 32.

The square root of 53903561 is about 7341.9044532056. The cubic root of 53903561 is about 377.7511706527.

The spelling of 53903561 in words is "fifty-three million, nine hundred three thousand, five hundred sixty-one".