55231211 has 8 divisors (see below), whose sum is σ = 65865984. Its totient is φ = 45282600.

The previous prime is 55231207. The next prime is 55231219. The reversal of 55231211 is 11213255.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 55231211 - 2² = 55231207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55231219) 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, 171365 + ... + 171686.

It is an arithmetic number, because the mean of its divisors is an integer number (8233248).

Almost surely, 2^55231211 is an apocalyptic number.

55231211 is a deficient number, since it is larger than the sum of its proper divisors (10634773).

55231211 is a wasteful number, since it uses less digits than its factorization.

55231211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343081.

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

The square root of 55231211 is about 7431.7703812752. The cubic root of 55231211 is about 380.8274007357.

Adding to 55231211 its reverse (11213255), we get a palindrome (66444466).

The spelling of 55231211 in words is "fifty-five million, two hundred thirty-one thousand, two hundred eleven".