54402781 has 2 divisors, whose sum is σ = 54402782. Its totient is φ = 54402780.

The previous prime is 54402707. The next prime is 54402841. The reversal of 54402781 is 18720445.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47485881 + 6916900 = 6891^2 + 2630^2 .

It is a cyclic number.

It is not a de Polignac number, because 54402781 - 2⁹ = 54402269 is a prime.

It is a super-2 number, since 2×54402781² = 5919325161067922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54402281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27201390 + 27201391.

It is an arithmetic number, because the mean of its divisors is an integer number (27201391).

Almost surely, 2^54402781 is an apocalyptic number.

It is an amenable number.

54402781 is a deficient number, since it is larger than the sum of its proper divisors (1).

54402781 is an equidigital number, since it uses as much as digits as its factorization.

54402781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 54402781 is about 7375.8240895509. The cubic root of 54402781 is about 378.9137515118.

The spelling of 54402781 in words is "fifty-four million, four hundred two thousand, seven hundred eighty-one".