55742081 has 2 divisors, whose sum is σ = 55742082. Its totient is φ = 55742080.

The previous prime is 55742069. The next prime is 55742101. The reversal of 55742081 is 18024755.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54760000 + 982081 = 7400^2 + 991^2 .

It is a cyclic number.

It is not a de Polignac number, because 55742081 - 2¹⁸ = 55479937 is a prime.

It is a super-2 number, since 2×55742081² = 6214359188421122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55742051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27871040 + 27871041.

It is an arithmetic number, because the mean of its divisors is an integer number (27871041).

Almost surely, 2^55742081 is an apocalyptic number.

It is an amenable number.

55742081 is a deficient number, since it is larger than the sum of its proper divisors (1).

55742081 is an equidigital number, since it uses as much as digits as its factorization.

55742081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 55742081 is about 7466.0619472383. The cubic root of 55742081 is about 381.9979738204.

The spelling of 55742081 in words is "fifty-five million, seven hundred forty-two thousand, eighty-one".