54159221 has 2 divisors, whose sum is σ = 54159222. Its totient is φ = 54159220.

The previous prime is 54159169. The next prime is 54159223. The reversal of 54159221 is 12295145.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29008996 + 25150225 = 5386^2 + 5015^2 .

It is a cyclic number.

It is not a de Polignac number, because 54159221 - 2¹⁰ = 54158197 is a prime.

It is a Sophie Germain prime.

Together with 54159223, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54159223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27079610 + 27079611.

It is an arithmetic number, because the mean of its divisors is an integer number (27079611).

Almost surely, 2^54159221 is an apocalyptic number.

It is an amenable number.

54159221 is a deficient number, since it is larger than the sum of its proper divisors (1).

54159221 is an equidigital number, since it uses as much as digits as its factorization.

54159221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 29.

The square root of 54159221 is about 7359.2948711137. The cubic root of 54159221 is about 378.3474428336.

The spelling of 54159221 in words is "fifty-four million, one hundred fifty-nine thousand, two hundred twenty-one".