55211123 has 4 divisors (see below), whose sum is σ = 60230328. Its totient is φ = 50191920.

The previous prime is 55211111. The next prime is 55211153. The reversal of 55211123 is 32111255.

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 55211123 - 2²⁰ = 54162547 is a prime.

It is a super-2 number, since 2×55211123² = 6096536205842258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55211095 and 55211104.

It is not an unprimeable number, because it can be changed into a prime (55211153) 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, 2509586 + ... + 2509607.

It is an arithmetic number, because the mean of its divisors is an integer number (15057582).

Almost surely, 2^55211123 is an apocalyptic number.

55211123 is a deficient number, since it is larger than the sum of its proper divisors (5019205).

55211123 is a wasteful number, since it uses less digits than its factorization.

55211123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5019204.

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

The square root of 55211123 is about 7430.4187634345. The cubic root of 55211123 is about 380.7812252229.

Adding to 55211123 its reverse (32111255), we get a palindrome (87322378).

The spelling of 55211123 in words is "fifty-five million, two hundred eleven thousand, one hundred twenty-three".