55501111 has 4 divisors (see below), whose sum is σ = 55697512. Its totient is φ = 55304712.

The previous prime is 55501091. The next prime is 55501177. The reversal of 55501111 is 11110555.

It is a happy number.

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 55501111 - 2⁵ = 55501079 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 (55501181) 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, 97776 + ... + 98341.

It is an arithmetic number, because the mean of its divisors is an integer number (13924378).

Almost surely, 2^55501111 is an apocalyptic number.

55501111 is a deficient number, since it is larger than the sum of its proper divisors (196401).

55501111 is a wasteful number, since it uses less digits than its factorization.

55501111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196400.

The product of its (nonzero) digits is 125, while the sum is 19.

The square root of 55501111 is about 7449.9067779402. The cubic root of 55501111 is about 381.4467265278.

Adding to 55501111 its reverse (11110555), we get a palindrome (66611666).

The spelling of 55501111 in words is "fifty-five million, five hundred one thousand, one hundred eleven".