54246721 has 2 divisors, whose sum is σ = 54246722. Its totient is φ = 54246720.

The previous prime is 54246697. The next prime is 54246727. The reversal of 54246721 is 12764245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54228496 + 18225 = 7364^2 + 135^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54246721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (54246727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27123360 + 27123361.

It is an arithmetic number, because the mean of its divisors is an integer number (27123361).

Almost surely, 2^54246721 is an apocalyptic number.

It is an amenable number.

54246721 is a deficient number, since it is larger than the sum of its proper divisors (1).

54246721 is an equidigital number, since it uses as much as digits as its factorization.

54246721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 31.

The square root of 54246721 is about 7365.2373349404. The cubic root of 54246721 is about 378.5510867573.

The spelling of 54246721 in words is "fifty-four million, two hundred forty-six thousand, seven hundred twenty-one".