22143400381 has 2 divisors, whose sum is σ = 22143400382. Its totient is φ = 22143400380.

The previous prime is 22143400361. The next prime is 22143400423. The reversal of 22143400381 is 18300434122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18750920356 + 3392480025 = 136934^2 + 58245^2 .

It is a cyclic number.

It is not a de Polignac number, because 22143400381 - 2⁹ = 22143399869 is a prime.

It is a super-2 number, since 2×22143400381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22143400361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11071700190 + 11071700191.

It is an arithmetic number, because the mean of its divisors is an integer number (11071700191).

Almost surely, 2^22143400381 is an apocalyptic number.

It is an amenable number.

22143400381 is a deficient number, since it is larger than the sum of its proper divisors (1).

22143400381 is an equidigital number, since it uses as much as digits as its factorization.

22143400381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 28.

The spelling of 22143400381 in words is "twenty-two billion, one hundred forty-three million, four hundred thousand, three hundred eighty-one".