55121829 has 16 divisors (see below), whose sum is σ = 85949952. Its totient is φ = 30765168.

The previous prime is 55121819. The next prime is 55121849. The reversal of 55121829 is 92812155.

55121829 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55121829 - 2¹¹ = 55119781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55121829.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55121819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29619 + ... + 31424.

It is an arithmetic number, because the mean of its divisors is an integer number (5371872).

Almost surely, 2^55121829 is an apocalyptic number.

It is an amenable number.

55121829 is a deficient number, since it is larger than the sum of its proper divisors (30828123).

55121829 is a wasteful number, since it uses less digits than its factorization.

55121829 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61096.

The product of its digits is 7200, while the sum is 33.

The square root of 55121829 is about 7424.4076531397. The cubic root of 55121829 is about 380.5758328806.

The spelling of 55121829 in words is "fifty-five million, one hundred twenty-one thousand, eight hundred twenty-nine".