2206394381 has 2 divisors, whose sum is σ = 2206394382. Its totient is φ = 2206394380.

The previous prime is 2206394369. The next prime is 2206394387. The reversal of 2206394381 is 1834936022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1239744100 + 966650281 = 35210^2 + 31091^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2206394381 is a prime.

It is a super-2 number, since 2×2206394381² = 9736352329016746322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2206394387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1103197190 + 1103197191.

It is an arithmetic number, because the mean of its divisors is an integer number (1103197191).

Almost surely, 2^2206394381 is an apocalyptic number.

It is an amenable number.

2206394381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2206394381 is an equidigital number, since it uses as much as digits as its factorization.

2206394381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 2206394381 is about 46972.2724700434. The cubic root of 2206394381 is about 1301.8503003119.

The spelling of 2206394381 in words is "two billion, two hundred six million, three hundred ninety-four thousand, three hundred eighty-one".