53290665 has 24 divisors (see below), whose sum is σ = 97805448. Its totient is φ = 26749440.

The previous prime is 53290663. The next prime is 53290681. The reversal of 53290665 is 56609235.

53290665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1838736 + 51451929 = 1356^2 + 7173^2 .

It is not a de Polignac number, because 53290665 - 2¹ = 53290663 is a prime.

It is a super-2 number, since 2×53290665² = 5679789952284450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (53290663) 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 23 ways as a sum of consecutive naturals, for example, 34066 + ... + 35595.

It is an arithmetic number, because the mean of its divisors is an integer number (4075227).

Almost surely, 2^53290665 is an apocalyptic number.

It is an amenable number.

53290665 is a deficient number, since it is larger than the sum of its proper divisors (44514783).

53290665 is a wasteful number, since it uses less digits than its factorization.

53290665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69689 (or 69686 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 53290665 is about 7300.0455478031. The cubic root of 53290665 is about 376.3140036738.

The spelling of 53290665 in words is "fifty-three million, two hundred ninety thousand, six hundred sixty-five".