254133521 has 2 divisors, whose sum is σ = 254133522. Its totient is φ = 254133520.

The previous prime is 254133499. The next prime is 254133541. The reversal of 254133521 is 125331452.

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., 240591121 + 13542400 = 15511^2 + 3680^2 .

It is a cyclic number.

It is not a de Polignac number, because 254133521 - 2¹⁸ = 253871377 is a prime.

It is not a weakly prime, because it can be changed into another prime (254133541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127066760 + 127066761.

It is an arithmetic number, because the mean of its divisors is an integer number (127066761).

Almost surely, 2^254133521 is an apocalyptic number.

It is an amenable number.

254133521 is a deficient number, since it is larger than the sum of its proper divisors (1).

254133521 is an equidigital number, since it uses as much as digits as its factorization.

254133521 is an odious number, because the sum of its binary digits is odd.

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

The square root of 254133521 is about 15941.5658264802. The cubic root of 254133521 is about 633.4135037632.

Adding to 254133521 its reverse (125331452), we get a palindrome (379464973).

The spelling of 254133521 in words is "two hundred fifty-four million, one hundred thirty-three thousand, five hundred twenty-one".