53415665 has 8 divisors (see below), whose sum is σ = 64666728. Its totient is φ = 42353920.

The previous prime is 53415647. The next prime is 53415689. The reversal of 53415665 is 56651435.

It can be written as a sum of positive squares in 4 ways, for example, as 2849344 + 50566321 = 1688^2 + 7111^2 .

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

It is not a de Polignac number, because 53415665 - 2⁶ = 53415601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46706 + ... + 47835.

It is an arithmetic number, because the mean of its divisors is an integer number (8083341).

Almost surely, 2^53415665 is an apocalyptic number.

It is an amenable number.

53415665 is a deficient number, since it is larger than the sum of its proper divisors (11251063).

53415665 is a wasteful number, since it uses less digits than its factorization.

53415665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94659.

The product of its digits is 54000, while the sum is 35.

The square root of 53415665 is about 7308.6021235254. The cubic root of 53415665 is about 376.6080046304.

The spelling of 53415665 in words is "fifty-three million, four hundred fifteen thousand, six hundred sixty-five".