55428261 has 24 divisors (see below), whose sum is σ = 86676480. Its totient is φ = 31413312.

The previous prime is 55428259. The next prime is 55428281. The reversal of 55428261 is 16282455.

55428261 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 55428261 - 2¹ = 55428259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55428281) 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 23 ways as a sum of consecutive naturals, for example, 17185 + ... + 20153.

It is an arithmetic number, because the mean of its divisors is an integer number (3611520).

Almost surely, 2^55428261 is an apocalyptic number.

It is an amenable number.

55428261 is a deficient number, since it is larger than the sum of its proper divisors (31248219).

55428261 is a wasteful number, since it uses less digits than its factorization.

55428261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3113 (or 3106 counting only the distinct ones).

The product of its digits is 19200, while the sum is 33.

The square root of 55428261 is about 7445.0158495466. The cubic root of 55428261 is about 381.2797595331.

The spelling of 55428261 in words is "fifty-five million, four hundred twenty-eight thousand, two hundred sixty-one".