255442157 has 2 divisors, whose sum is σ = 255442158. Its totient is φ = 255442156.

The previous prime is 255442151. The next prime is 255442181. The reversal of 255442157 is 751244552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209120521 + 46321636 = 14461^2 + 6806^2 .

It is a cyclic number.

It is not a de Polignac number, because 255442157 - 2²⁴ = 238664941 is a prime.

It is a super-3 number, since 3×255442157³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255442151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127721078 + 127721079.

It is an arithmetic number, because the mean of its divisors is an integer number (127721079).

Almost surely, 2^255442157 is an apocalyptic number.

It is an amenable number.

255442157 is a deficient number, since it is larger than the sum of its proper divisors (1).

255442157 is an equidigital number, since it uses as much as digits as its factorization.

255442157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56000, while the sum is 35.

The square root of 255442157 is about 15982.5578991599. The cubic root of 255442157 is about 634.4988767509.

The spelling of 255442157 in words is "two hundred fifty-five million, four hundred forty-two thousand, one hundred fifty-seven".