55111730 has 16 divisors (see below), whose sum is σ = 101312640. Its totient is φ = 21575472.

The previous prime is 55111717. The next prime is 55111733. The reversal of 55111730 is 3711155.

It is a junction number, because it is equal to n+sod(n) for n = 55111696 and 55111705.

It is not an unprimeable number, because it can be changed into a prime (55111733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58160 + ... + 59099.

It is an arithmetic number, because the mean of its divisors is an integer number (6332040).

Almost surely, 2^55111730 is an apocalyptic number.

55111730 is a deficient number, since it is larger than the sum of its proper divisors (46200910).

55111730 is a wasteful number, since it uses less digits than its factorization.

55111730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117313.

The product of its (nonzero) digits is 525, while the sum is 23.

The square root of 55111730 is about 7423.7275003869. The cubic root of 55111730 is about 380.5525893964.

Adding to 55111730 its reverse (3711155), we get a palindrome (58822885).

The spelling of 55111730 in words is "fifty-five million, one hundred eleven thousand, seven hundred thirty".