255043554421 has 2 divisors, whose sum is σ = 255043554422. Its totient is φ = 255043554420.

The previous prime is 255043554419. The next prime is 255043554457. The reversal of 255043554421 is 124455340552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 252922491396 + 2121063025 = 502914^2 + 46055^2 .

It is a cyclic number.

It is not a de Polignac number, because 255043554421 - 2¹ = 255043554419 is a prime.

Together with 255043554419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255043554481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127521777210 + 127521777211.

It is an arithmetic number, because the mean of its divisors is an integer number (127521777211).

Almost surely, 2^255043554421 is an apocalyptic number.

It is an amenable number.

255043554421 is a deficient number, since it is larger than the sum of its proper divisors (1).

255043554421 is an equidigital number, since it uses as much as digits as its factorization.

255043554421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480000, while the sum is 40.

Adding to 255043554421 its reverse (124455340552), we get a palindrome (379498894973).

The spelling of 255043554421 in words is "two hundred fifty-five billion, forty-three million, five hundred fifty-four thousand, four hundred twenty-one".