53515805 has 16 divisors (see below), whose sum is σ = 73868160. Its totient is φ = 36459072.

The previous prime is 53515757. The next prime is 53515807. The reversal of 53515805 is 50851535.

It is a cyclic number.

It is not a de Polignac number, because 53515805 - 2¹⁶ = 53450269 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53515807) 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, 626 + ... + 10364.

It is an arithmetic number, because the mean of its divisors is an integer number (4616760).

Almost surely, 2^53515805 is an apocalyptic number.

It is an amenable number.

53515805 is a deficient number, since it is larger than the sum of its proper divisors (20352355).

53515805 is a wasteful number, since it uses less digits than its factorization.

53515805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9908.

The product of its (nonzero) digits is 15000, while the sum is 32.

The square root of 53515805 is about 7315.4497469397. The cubic root of 53515805 is about 376.8432039396.

The spelling of 53515805 in words is "fifty-three million, five hundred fifteen thousand, eight hundred five".