2190005221 has 2 divisors, whose sum is σ = 2190005222. Its totient is φ = 2190005220.

The previous prime is 2190005177. The next prime is 2190005291. The reversal of 2190005221 is 1225000912.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2041774596 + 148230625 = 45186^2 + 12175^2 .

It is a cyclic number.

It is not a de Polignac number, because 2190005221 - 2¹¹ = 2190003173 is a prime.

It is a super-2 number, since 2×2190005221² = 9592245736014517682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2190005192 and 2190005201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2190005291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1095002610 + 1095002611.

It is an arithmetic number, because the mean of its divisors is an integer number (1095002611).

Almost surely, 2^2190005221 is an apocalyptic number.

It is an amenable number.

2190005221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2190005221 is an equidigital number, since it uses as much as digits as its factorization.

2190005221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 2190005221 is about 46797.4916101280. The cubic root of 2190005221 is about 1298.6188924157.

The spelling of 2190005221 in words is "two billion, one hundred ninety million, five thousand, two hundred twenty-one".