53406561 has 16 divisors (see below), whose sum is σ = 76870080. Its totient is φ = 32786880.

The previous prime is 53406557. The next prime is 53406593. The reversal of 53406561 is 16560435.

It is not a de Polignac number, because 53406561 - 2² = 53406557 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (53406541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17755 + ... + 20543.

It is an arithmetic number, because the mean of its divisors is an integer number (4804380).

Almost surely, 2^53406561 is an apocalyptic number.

It is an amenable number.

53406561 is a deficient number, since it is larger than the sum of its proper divisors (23463519).

53406561 is a wasteful number, since it uses less digits than its factorization.

53406561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3296.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 53406561 is about 7307.9792692645. The cubic root of 53406561 is about 376.5866074487.

Adding to 53406561 its reverse (16560435), we get a palindrome (69966996).

The spelling of 53406561 in words is "fifty-three million, four hundred six thousand, five hundred sixty-one".