55321605 has 12 divisors (see below), whose sum is σ = 95890860. Its totient is φ = 29504832.

The previous prime is 55321579. The next prime is 55321627. The reversal of 55321605 is 50612355.

55321605 is a `hidden beast` number, since 5 + 53 + 2 + 1 + 605 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6796449 + 48525156 = 2607^2 + 6966^2 .

It is not a de Polignac number, because 55321605 - 2⁵ = 55321573 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 614640 + ... + 614729.

It is an arithmetic number, because the mean of its divisors is an integer number (7990905).

Almost surely, 2^55321605 is an apocalyptic number.

It is an amenable number.

55321605 is a deficient number, since it is larger than the sum of its proper divisors (40569255).

55321605 is a wasteful number, since it uses less digits than its factorization.

55321605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1229380 (or 1229377 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 55321605 is about 7437.8494875871. The cubic root of 55321605 is about 381.0350475127.

The spelling of 55321605 in words is "fifty-five million, three hundred twenty-one thousand, six hundred five".