55521602111 has 4 divisors (see below), whose sum is σ = 55589065392. Its totient is φ = 55454138832.

The previous prime is 55521602083. The next prime is 55521602137. The reversal of 55521602111 is 11120612555.

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

It is a cyclic number.

It is not a de Polignac number, because 55521602111 - 2¹⁸ = 55521339967 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 (55521602141) 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, 33730406 + ... + 33732051.

It is an arithmetic number, because the mean of its divisors is an integer number (13897266348).

Almost surely, 2^55521602111 is an apocalyptic number.

55521602111 is a deficient number, since it is larger than the sum of its proper divisors (67463281).

55521602111 is an equidigital number, since it uses as much as digits as its factorization.

55521602111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67463280.

The product of its (nonzero) digits is 3000, while the sum is 29.

The spelling of 55521602111 in words is "fifty-five billion, five hundred twenty-one million, six hundred two thousand, one hundred eleven".