55420481 has 2 divisors, whose sum is σ = 55420482. Its totient is φ = 55420480.

The previous prime is 55420471. The next prime is 55420517. The reversal of 55420481 is 18402455.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36192256 + 19228225 = 6016^2 + 4385^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55420481 is a prime.

It is a super-2 number, since 2×55420481² = 6142859428542722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55420451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27710240 + 27710241.

It is an arithmetic number, because the mean of its divisors is an integer number (27710241).

Almost surely, 2^55420481 is an apocalyptic number.

It is an amenable number.

55420481 is a deficient number, since it is larger than the sum of its proper divisors (1).

55420481 is an equidigital number, since it uses as much as digits as its factorization.

55420481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 55420481 is about 7444.4933340020. The cubic root of 55420481 is about 381.2619196847.

The spelling of 55420481 in words is "fifty-five million, four hundred twenty thousand, four hundred eighty-one".