55300121 has 2 divisors, whose sum is σ = 55300122. Its totient is φ = 55300120.

The previous prime is 55300117. The next prime is 55300159. The reversal of 55300121 is 12100355.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43494025 + 11806096 = 6595^2 + 3436^2 .

It is a cyclic number.

It is not a de Polignac number, because 55300121 - 2² = 55300117 is a prime.

It is a super-2 number, since 2×55300121² = 6116206765229282, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55300121.

It is not a weakly prime, because it can be changed into another prime (55300171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27650060 + 27650061.

It is an arithmetic number, because the mean of its divisors is an integer number (27650061).

Almost surely, 2^55300121 is an apocalyptic number.

It is an amenable number.

55300121 is a deficient number, since it is larger than the sum of its proper divisors (1).

55300121 is an equidigital number, since it uses as much as digits as its factorization.

55300121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 55300121 is about 7436.4051126872. The cubic root of 55300121 is about 380.9857164730.

Adding to 55300121 its reverse (12100355), we get a palindrome (67400476).

The spelling of 55300121 in words is "fifty-five million, three hundred thousand, one hundred twenty-one".