55255121 has 8 divisors (see below), whose sum is σ = 57697920. Its totient is φ = 52848208.

The previous prime is 55255091. The next prime is 55255133. The reversal of 55255121 is 12155255.

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

It is a de Polignac number, because none of the positive numbers 2^k-55255121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55255621) 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, 5801 + ... + 12006.

It is an arithmetic number, because the mean of its divisors is an integer number (7212240).

Almost surely, 2^55255121 is an apocalyptic number.

It is an amenable number.

55255121 is a deficient number, since it is larger than the sum of its proper divisors (2442799).

55255121 is a wasteful number, since it uses less digits than its factorization.

55255121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17943.

The product of its digits is 2500, while the sum is 26.

The square root of 55255121 is about 7433.3788414153. The cubic root of 55255121 is about 380.8823471410.

The spelling of 55255121 in words is "fifty-five million, two hundred fifty-five thousand, one hundred twenty-one".