55211131 has 8 divisors (see below), whose sum is σ = 58299200. Its totient is φ = 52141320.

The previous prime is 55211111. The next prime is 55211153. The reversal of 55211131 is 13111255.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55211131 - 2⁷ = 55211003 is a prime.

It is a super-2 number, since 2×55211131² = 6096537972598322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55211099 and 55211108.

It is not an unprimeable number, because it can be changed into a prime (55211111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1900 + ... + 10678.

It is an arithmetic number, because the mean of its divisors is an integer number (7287400).

Almost surely, 2^55211131 is an apocalyptic number.

55211131 is a deficient number, since it is larger than the sum of its proper divisors (3088069).

55211131 is a wasteful number, since it uses less digits than its factorization.

55211131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9129.

The product of its digits is 150, while the sum is 19.

The square root of 55211131 is about 7430.4193017622. The cubic root of 55211131 is about 380.7812436144.

Adding to 55211131 its reverse (13111255), we get a palindrome (68322386).

The spelling of 55211131 in words is "fifty-five million, two hundred eleven thousand, one hundred thirty-one".