154513133321 has 2 divisors, whose sum is σ = 154513133322. Its totient is φ = 154513133320.

The previous prime is 154513133311. The next prime is 154513133329. The reversal of 154513133321 is 123331315451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 150184151296 + 4328982025 = 387536^2 + 65795^2 .

It is a cyclic number.

It is not a de Polignac number, because 154513133321 - 2²² = 154508939017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (154513133329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77256566660 + 77256566661.

It is an arithmetic number, because the mean of its divisors is an integer number (77256566661).

Almost surely, 2^154513133321 is an apocalyptic number.

It is an amenable number.

154513133321 is a deficient number, since it is larger than the sum of its proper divisors (1).

154513133321 is an equidigital number, since it uses as much as digits as its factorization.

154513133321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 32.

Adding to 154513133321 its reverse (123331315451), we get a palindrome (277844448772).

The spelling of 154513133321 in words is "one hundred fifty-four billion, five hundred thirteen million, one hundred thirty-three thousand, three hundred twenty-one".