255055421 has 2 divisors, whose sum is σ = 255055422. Its totient is φ = 255055420.

The previous prime is 255055397. The next prime is 255055447. The reversal of 255055421 is 124550552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 184579396 + 70476025 = 13586^2 + 8395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255055421 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255055121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127527710 + 127527711.

It is an arithmetic number, because the mean of its divisors is an integer number (127527711).

Almost surely, 2^255055421 is an apocalyptic number.

It is an amenable number.

255055421 is a deficient number, since it is larger than the sum of its proper divisors (1).

255055421 is an equidigital number, since it uses as much as digits as its factorization.

255055421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 255055421 is about 15970.4546272171. The cubic root of 255055421 is about 634.1785074214.

The spelling of 255055421 in words is "two hundred fifty-five million, fifty-five thousand, four hundred twenty-one".