55221235 has 4 divisors (see below), whose sum is σ = 66265488. Its totient is φ = 44176984.

The previous prime is 55221217. The next prime is 55221241. The reversal of 55221235 is 53212255.

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 55221235 - 2⁵ = 55221203 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5522119 + ... + 5522128.

It is an arithmetic number, because the mean of its divisors is an integer number (16566372).

Almost surely, 2^55221235 is an apocalyptic number.

55221235 is a deficient number, since it is larger than the sum of its proper divisors (11044253).

55221235 is a wasteful number, since it uses less digits than its factorization.

55221235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11044252.

The product of its digits is 3000, while the sum is 25.

The square root of 55221235 is about 7431.0991784527. The cubic root of 55221235 is about 380.8044706880.

The spelling of 55221235 in words is "fifty-five million, two hundred twenty-one thousand, two hundred thirty-five".