255421405157 has 2 divisors, whose sum is σ = 255421405158. Its totient is φ = 255421405156.

The previous prime is 255421405079. The next prime is 255421405271. The reversal of 255421405157 is 751504124552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129402795076 + 126018610081 = 359726^2 + 354991^2 .

It is a cyclic number.

It is not a de Polignac number, because 255421405157 - 2¹⁴ = 255421388773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255421404157) 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, 127710702578 + 127710702579.

It is an arithmetic number, because the mean of its divisors is an integer number (127710702579).

Almost surely, 2^255421405157 is an apocalyptic number.

It is an amenable number.

255421405157 is a deficient number, since it is larger than the sum of its proper divisors (1).

255421405157 is an equidigital number, since it uses as much as digits as its factorization.

255421405157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280000, while the sum is 41.

The spelling of 255421405157 in words is "two hundred fifty-five billion, four hundred twenty-one million, four hundred five thousand, one hundred fifty-seven".