54707221 has 2 divisors, whose sum is σ = 54707222. Its totient is φ = 54707220.

The previous prime is 54707197. The next prime is 54707249. The reversal of 54707221 is 12270745.

It is an a-pointer prime, because the next prime (54707249) can be obtained adding 54707221 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42380100 + 12327121 = 6510^2 + 3511^2 .

It is a cyclic number.

It is not a de Polignac number, because 54707221 - 2⁵ = 54707189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54707221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54707291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27353610 + 27353611.

It is an arithmetic number, because the mean of its divisors is an integer number (27353611).

Almost surely, 2^54707221 is an apocalyptic number.

It is an amenable number.

54707221 is a deficient number, since it is larger than the sum of its proper divisors (1).

54707221 is an equidigital number, since it uses as much as digits as its factorization.

54707221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 54707221 is about 7396.4329916521. The cubic root of 54707221 is about 379.6192423410.

Adding to 54707221 its reverse (12270745), we get a palindrome (66977966).

The spelling of 54707221 in words is "fifty-four million, seven hundred seven thousand, two hundred twenty-one".