54656221 has 2 divisors, whose sum is σ = 54656222. Its totient is φ = 54656220.

The previous prime is 54656219. The next prime is 54656233. The reversal of 54656221 is 12265645.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32330596 + 22325625 = 5686^2 + 4725^2 .

It is a cyclic number.

It is not a de Polignac number, because 54656221 - 2¹ = 54656219 is a prime.

Together with 54656219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54656201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27328110 + 27328111.

It is an arithmetic number, because the mean of its divisors is an integer number (27328111).

Almost surely, 2^54656221 is an apocalyptic number.

It is an amenable number.

54656221 is a deficient number, since it is larger than the sum of its proper divisors (1).

54656221 is an equidigital number, since it uses as much as digits as its factorization.

54656221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 31.

The square root of 54656221 is about 7392.9845799920. The cubic root of 54656221 is about 379.5012408515.

The spelling of 54656221 in words is "fifty-four million, six hundred fifty-six thousand, two hundred twenty-one".