220054921 has 2 divisors, whose sum is σ = 220054922. Its totient is φ = 220054920.

The previous prime is 220054883. The next prime is 220054927. The reversal of 220054921 is 129450022.

220054921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116748025 + 103306896 = 10805^2 + 10164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220054921 is a prime.

It is not a weakly prime, because it can be changed into another prime (220054927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110027460 + 110027461.

It is an arithmetic number, because the mean of its divisors is an integer number (110027461).

Almost surely, 2^220054921 is an apocalyptic number.

It is an amenable number.

220054921 is a deficient number, since it is larger than the sum of its proper divisors (1).

220054921 is an equidigital number, since it uses as much as digits as its factorization.

220054921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 220054921 is about 14834.2482451926. The cubic root of 220054921 is about 603.7313039975.

It can be divided in two parts, 2200 and 54921, that added together give a square (57121 = 239²).

The spelling of 220054921 in words is "two hundred twenty million, fifty-four thousand, nine hundred twenty-one".