2227500221 has 2 divisors, whose sum is σ = 2227500222. Its totient is φ = 2227500220.

The previous prime is 2227500167. The next prime is 2227500227. The reversal of 2227500221 is 1220057222.

2227500221 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., 2080363321 + 147136900 = 45611^2 + 12130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2227500221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2227500227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1113750110 + 1113750111.

It is an arithmetic number, because the mean of its divisors is an integer number (1113750111).

Almost surely, 2^2227500221 is an apocalyptic number.

It is an amenable number.

2227500221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2227500221 is an equidigital number, since it uses as much as digits as its factorization.

2227500221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 2227500221 is about 47196.4005089371. The cubic root of 2227500221 is about 1305.9881968670.

Adding to 2227500221 its reverse (1220057222), we get a palindrome (3447557443).

The spelling of 2227500221 in words is "two billion, two hundred twenty-seven million, five hundred thousand, two hundred twenty-one".