55121256 has 32 divisors (see below), whose sum is σ = 153115200. Its totient is φ = 18373680.

The previous prime is 55121251. The next prime is 55121267. The reversal of 55121256 is 65212155.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55121251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127380 + ... + 127811.

It is an arithmetic number, because the mean of its divisors is an integer number (4784850).

Almost surely, 2^55121256 is an apocalyptic number.

It is an amenable number.

55121256 is an abundant number, since it is smaller than the sum of its proper divisors (97993944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55121256 is a wasteful number, since it uses less digits than its factorization.

55121256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255206 (or 255196 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 55121256 is about 7424.3690641023. The cubic root of 55121256 is about 380.5745141610.

The spelling of 55121256 in words is "fifty-five million, one hundred twenty-one thousand, two hundred fifty-six".