255133421 has 2 divisors, whose sum is σ = 255133422. Its totient is φ = 255133420.

The previous prime is 255133397. The next prime is 255133427. The reversal of 255133421 is 124331552.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 182628196 + 72505225 = 13514^2 + 8515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255133421 is a prime.

It is a super-2 number, since 2×255133421² = 130186125022326482, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255133427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127566710 + 127566711.

It is an arithmetic number, because the mean of its divisors is an integer number (127566711).

Almost surely, 2^255133421 is an apocalyptic number.

It is an amenable number.

255133421 is a deficient number, since it is larger than the sum of its proper divisors (1).

255133421 is an equidigital number, since it uses as much as digits as its factorization.

255133421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 26.

The square root of 255133421 is about 15972.8964499242. The cubic root of 255133421 is about 634.2431481202.

Adding to 255133421 its reverse (124331552), we get a palindrome (379464973).

The spelling of 255133421 in words is "two hundred fifty-five million, one hundred thirty-three thousand, four hundred twenty-one".