55340121 has 4 divisors (see below), whose sum is σ = 73786832. Its totient is φ = 36893412.

The previous prime is 55340113. The next prime is 55340137. The reversal of 55340121 is 12104355.

55340121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 55340121 - 2³ = 55340113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55340101) 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 3 ways as a sum of consecutive naturals, for example, 9223351 + ... + 9223356.

It is an arithmetic number, because the mean of its divisors is an integer number (18446708).

Almost surely, 2^55340121 is an apocalyptic number.

It is an amenable number.

55340121 is a deficient number, since it is larger than the sum of its proper divisors (18446711).

55340121 is a wasteful number, since it uses less digits than its factorization.

55340121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18446710.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 55340121 is about 7439.0940980740. The cubic root of 55340121 is about 381.0775532568.

Adding to 55340121 its reverse (12104355), we get a palindrome (67444476).

The spelling of 55340121 in words is "fifty-five million, three hundred forty thousand, one hundred twenty-one".