55620517 has 4 divisors (see below), whose sum is σ = 55643500. Its totient is φ = 55597536.

The previous prime is 55620511. The next prime is 55620529. The reversal of 55620517 is 71502655.

55620517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16695396 + 38925121 = 4086^2 + 6239^2 .

It is a cyclic number.

It is not a de Polignac number, because 55620517 - 2¹¹ = 55618469 is a prime.

It is a super-2 number, since 2×55620517² = 6187283822694578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55620511) 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 3 ways as a sum of consecutive naturals, for example, 7368 + ... + 12865.

It is an arithmetic number, because the mean of its divisors is an integer number (13910875).

Almost surely, 2^55620517 is an apocalyptic number.

It is an amenable number.

55620517 is a deficient number, since it is larger than the sum of its proper divisors (22983).

55620517 is a wasteful number, since it uses less digits than its factorization.

55620517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22982.

The product of its (nonzero) digits is 10500, while the sum is 31.

The square root of 55620517 is about 7457.9163980297. The cubic root of 55620517 is about 381.7200808352.

The spelling of 55620517 in words is "fifty-five million, six hundred twenty thousand, five hundred seventeen".