254040242225381 has 2 divisors, whose sum is σ = 254040242225382. Its totient is φ = 254040242225380.

The previous prime is 254040242225377. The next prime is 254040242225387. The reversal of 254040242225381 is 183522242040452.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191954651752900 + 62085590472481 = 13854770^2 + 7879441^2 .

It is a cyclic number.

It is not a de Polignac number, because 254040242225381 - 2² = 254040242225377 is a prime.

It is a super-2 number, since 2×254040242225381² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254040242225387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127020121112690 + 127020121112691.

It is an arithmetic number, because the mean of its divisors is an integer number (127020121112691).

Almost surely, 2^{254040242225381} is an apocalyptic number.

It is an amenable number.

254040242225381 is a deficient number, since it is larger than the sum of its proper divisors (1).

254040242225381 is an equidigital number, since it uses as much as digits as its factorization.

254040242225381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1228800, while the sum is 44.

The spelling of 254040242225381 in words is "two hundred fifty-four trillion, forty billion, two hundred forty-two million, two hundred twenty-five thousand, three hundred eighty-one".