224135531381 has 2 divisors, whose sum is σ = 224135531382. Its totient is φ = 224135531380.

The previous prime is 224135531363. The next prime is 224135531429. The reversal of 224135531381 is 183135531422.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160928543281 + 63206988100 = 401159^2 + 251410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-224135531381 is a prime.

It is a super-2 number, since 2×224135531381² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (224135531341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112067765690 + 112067765691.

It is an arithmetic number, because the mean of its divisors is an integer number (112067765691).

Almost surely, 2^224135531381 is an apocalyptic number.

It is an amenable number.

224135531381 is a deficient number, since it is larger than the sum of its proper divisors (1).

224135531381 is an equidigital number, since it uses as much as digits as its factorization.

224135531381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 38.

The spelling of 224135531381 in words is "two hundred twenty-four billion, one hundred thirty-five million, five hundred thirty-one thousand, three hundred eighty-one".