55454681 has 2 divisors, whose sum is σ = 55454682. Its totient is φ = 55454680.

The previous prime is 55454657. The next prime is 55454687. The reversal of 55454681 is 18645455.

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., 54523456 + 931225 = 7384^2 + 965^2 .

It is a cyclic number.

It is not a de Polignac number, because 55454681 - 2¹⁸ = 55192537 is a prime.

It is a super-2 number, since 2×55454681² = 6150443289623522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55454687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27727340 + 27727341.

It is an arithmetic number, because the mean of its divisors is an integer number (27727341).

Almost surely, 2^55454681 is an apocalyptic number.

It is an amenable number.

55454681 is a deficient number, since it is larger than the sum of its proper divisors (1).

55454681 is an equidigital number, since it uses as much as digits as its factorization.

55454681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96000, while the sum is 38.

The square root of 55454681 is about 7446.7899795818. The cubic root of 55454681 is about 381.3403291835.

The spelling of 55454681 in words is "fifty-five million, four hundred fifty-four thousand, six hundred eighty-one".