53491065 has 16 divisors (see below), whose sum is σ = 85804800. Its totient is φ = 28455552.

The previous prime is 53491063. The next prime is 53491069. The reversal of 53491065 is 56019435.

53491065 = 726² + 727² + ... + 815².

It is a happy number.

53491065 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 53491065 - 2¹ = 53491063 is a prime.

It is a super-2 number, since 2×53491065² = 5722588069668450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53491063) 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, 1776 + ... + 10494.

It is an arithmetic number, because the mean of its divisors is an integer number (5362800).

Almost surely, 2^53491065 is an apocalyptic number.

It is an amenable number.

53491065 is a deficient number, since it is larger than the sum of its proper divisors (32313735).

53491065 is a wasteful number, since it uses less digits than its factorization.

53491065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9136.

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 53491065 is about 7313.7586096343. The cubic root of 53491065 is about 376.7851242882.

The spelling of 53491065 in words is "fifty-three million, four hundred ninety-one thousand, sixty-five".