55520611 has 4 divisors (see below), whose sum is σ = 56811832. Its totient is φ = 54229392.

The previous prime is 55520599. The next prime is 55520639. The reversal of 55520611 is 11602555.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11602555 = 5 ⋅2320511.

It is a cyclic number.

It is not a de Polignac number, because 55520611 - 2⁵ = 55520579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55520681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 645546 + ... + 645631.

It is an arithmetic number, because the mean of its divisors is an integer number (14202958).

Almost surely, 2^55520611 is an apocalyptic number.

55520611 is a deficient number, since it is larger than the sum of its proper divisors (1291221).

55520611 is a wasteful number, since it uses less digits than its factorization.

55520611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291220.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 55520611 is about 7451.2154042143. The cubic root of 55520611 is about 381.4913943437.

The spelling of 55520611 in words is "fifty-five million, five hundred twenty thousand, six hundred eleven".