55403111 has 4 divisors (see below), whose sum is σ = 55570824. Its totient is φ = 55235400.

The previous prime is 55403099. The next prime is 55403129. The reversal of 55403111 is 11130455.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55403111 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 (55403011) 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, 83360 + ... + 84021.

It is an arithmetic number, because the mean of its divisors is an integer number (13892706).

Almost surely, 2^55403111 is an apocalyptic number.

55403111 is a deficient number, since it is larger than the sum of its proper divisors (167713).

55403111 is a wasteful number, since it uses less digits than its factorization.

55403111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167712.

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

The square root of 55403111 is about 7443.3266084460. The cubic root of 55403111 is about 381.2220835601. Note that the first 3 decimals are identical.

Adding to 55403111 its reverse (11130455), we get a palindrome (66533566).

The spelling of 55403111 in words is "fifty-five million, four hundred three thousand, one hundred eleven".