55111403 has 4 divisors (see below), whose sum is σ = 55135080. Its totient is φ = 55087728.

The previous prime is 55111391. The next prime is 55111417. The reversal of 55111403 is 30411155.

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 55111403 - 2¹² = 55107307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55111493) 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, 7913 + ... + 13146.

It is an arithmetic number, because the mean of its divisors is an integer number (13783770).

Almost surely, 2^55111403 is an apocalyptic number.

55111403 is a deficient number, since it is larger than the sum of its proper divisors (23677).

55111403 is a wasteful number, since it uses less digits than its factorization.

55111403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23676.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 55111403 is about 7423.7054763777. The cubic root of 55111403 is about 380.5518367379.

Adding to 55111403 its reverse (30411155), we get a palindrome (85522558).

The spelling of 55111403 in words is "fifty-five million, one hundred eleven thousand, four hundred three".