53391065 has 32 divisors (see below), whose sum is σ = 79328256. Its totient is φ = 33592320.

The previous prime is 53391049. The next prime is 53391071. The reversal of 53391065 is 56019335.

It is not a de Polignac number, because 53391065 - 2⁴ = 53391049 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123089 + ... + 123521.

It is an arithmetic number, because the mean of its divisors is an integer number (2479008).

Almost surely, 2^53391065 is an apocalyptic number.

It is an amenable number.

53391065 is a deficient number, since it is larger than the sum of its proper divisors (25937191).

53391065 is a wasteful number, since it uses less digits than its factorization.

53391065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729.

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

The square root of 53391065 is about 7306.9189813491. The cubic root of 53391065 is about 376.5501815211.

The spelling of 53391065 in words is "fifty-three million, three hundred ninety-one thousand, sixty-five".