55270121 has 2 divisors, whose sum is σ = 55270122. Its totient is φ = 55270120.

The previous prime is 55270099. The next prime is 55270133. The reversal of 55270121 is 12107255.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46389721 + 8880400 = 6811^2 + 2980^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55270121 is a prime.

It is not a weakly prime, because it can be changed into another prime (55270141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27635060 + 27635061.

It is an arithmetic number, because the mean of its divisors is an integer number (27635061).

Almost surely, 2^55270121 is an apocalyptic number.

It is an amenable number.

55270121 is a deficient number, since it is larger than the sum of its proper divisors (1).

55270121 is an equidigital number, since it uses as much as digits as its factorization.

55270121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 55270121 is about 7434.3877353821. The cubic root of 55270121 is about 380.9168098188.

Adding to 55270121 its reverse (12107255), we get a palindrome (67377376).

The spelling of 55270121 in words is "fifty-five million, two hundred seventy thousand, one hundred twenty-one".