2031422381 has 2 divisors, whose sum is σ = 2031422382. Its totient is φ = 2031422380.

The previous prime is 2031422279. The next prime is 2031422413. The reversal of 2031422381 is 1832241302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1981140100 + 50282281 = 44510^2 + 7091^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031422381 - 2¹⁸ = 2031160237 is a prime.

It is a super-2 number, since 2×2031422381² = 8253353780055418322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2031422381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2031422881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015711190 + 1015711191.

It is an arithmetic number, because the mean of its divisors is an integer number (1015711191).

Almost surely, 2^2031422381 is an apocalyptic number.

It is an amenable number.

2031422381 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031422381 is an equidigital number, since it uses as much as digits as its factorization.

2031422381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 2031422381 is about 45071.3032982185. The cubic root of 2031422381 is about 1266.4850792862.

Adding to 2031422381 its reverse (1832241302), we get a palindrome (3863663683).

The spelling of 2031422381 in words is "two billion, thirty-one million, four hundred twenty-two thousand, three hundred eighty-one".