55049321 has 2 divisors, whose sum is σ = 55049322. Its totient is φ = 55049320.

The previous prime is 55049317. The next prime is 55049339. The reversal of 55049321 is 12394055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54834025 + 215296 = 7405^2 + 464^2 .

It is a cyclic number.

It is not a de Polignac number, because 55049321 - 2² = 55049317 is a prime.

It is a super-4 number, since 4×55049321⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (55045321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27524660 + 27524661.

It is an arithmetic number, because the mean of its divisors is an integer number (27524661).

Almost surely, 2^55049321 is an apocalyptic number.

It is an amenable number.

55049321 is a deficient number, since it is larger than the sum of its proper divisors (1).

55049321 is an equidigital number, since it uses as much as digits as its factorization.

55049321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 55049321 is about 7419.5229631021. The cubic root of 55049321 is about 380.4088881247.

The spelling of 55049321 in words is "fifty-five million, forty-nine thousand, three hundred twenty-one".