254131443540421 has 2 divisors, whose sum is σ = 254131443540422. Its totient is φ = 254131443540420.

The previous prime is 254131443540409. The next prime is 254131443540431. The reversal of 254131443540421 is 124045344131452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229427670796900 + 24703772743521 = 15146870^2 + 4970289^2 .

It is a cyclic number.

It is not a de Polignac number, because 254131443540421 - 2²⁹ = 254130906669509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254131443540431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127065721770210 + 127065721770211.

It is an arithmetic number, because the mean of its divisors is an integer number (127065721770211).

Almost surely, 2^{254131443540421} is an apocalyptic number.

It is an amenable number.

254131443540421 is a deficient number, since it is larger than the sum of its proper divisors (1).

254131443540421 is an equidigital number, since it uses as much as digits as its factorization.

254131443540421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 921600, while the sum is 43.

Adding to 254131443540421 its reverse (124045344131452), we get a palindrome (378176787671873).

The spelling of 254131443540421 in words is "two hundred fifty-four trillion, one hundred thirty-one billion, four hundred forty-three million, five hundred forty thousand, four hundred twenty-one".