55521005 has 8 divisors (see below), whose sum is σ = 66665592. Its totient is φ = 44389888.

The previous prime is 55521001. The next prime is 55521007. The reversal of 55521005 is 50012555.

It can be written as a sum of positive squares in 4 ways, for example, as 137641 + 55383364 = 371^2 + 7442^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 55521005 - 2² = 55521001 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55521001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12569 + ... + 16401.

It is an arithmetic number, because the mean of its divisors is an integer number (8333199).

Almost surely, 2^55521005 is an apocalyptic number.

It is an amenable number.

55521005 is a deficient number, since it is larger than the sum of its proper divisors (11144587).

55521005 is a wasteful number, since it uses less digits than its factorization.

55521005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6735.

The product of its (nonzero) digits is 1250, while the sum is 23.

The square root of 55521005 is about 7451.2418428071. The cubic root of 55521005 is about 381.4922967548.

The spelling of 55521005 in words is "fifty-five million, five hundred twenty-one thousand, five".