54205661 has 2 divisors, whose sum is σ = 54205662. Its totient is φ = 54205660.

The previous prime is 54205603. The next prime is 54205667. The reversal of 54205661 is 16650245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47183161 + 7022500 = 6869^2 + 2650^2 .

It is a cyclic number.

It is not a de Polignac number, because 54205661 - 2¹⁴ = 54189277 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54205667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27102830 + 27102831.

It is an arithmetic number, because the mean of its divisors is an integer number (27102831).

Almost surely, 2^54205661 is an apocalyptic number.

It is an amenable number.

54205661 is a deficient number, since it is larger than the sum of its proper divisors (1).

54205661 is an equidigital number, since it uses as much as digits as its factorization.

54205661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 54205661 is about 7362.4493886206. The cubic root of 54205661 is about 378.4555526824.

The spelling of 54205661 in words is "fifty-four million, two hundred five thousand, six hundred sixty-one".