154540522321 has 2 divisors, whose sum is σ = 154540522322. Its totient is φ = 154540522320.

The previous prime is 154540522273. The next prime is 154540522343. The reversal of 154540522321 is 123225045451.

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., 147178882321 + 7361640000 = 383639^2 + 85800^2 .

It is a cyclic number.

It is not a de Polignac number, because 154540522321 - 2²¹ = 154538425169 is a prime.

It is not a weakly prime, because it can be changed into another prime (154540522351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77270261160 + 77270261161.

It is an arithmetic number, because the mean of its divisors is an integer number (77270261161).

Almost surely, 2^154540522321 is an apocalyptic number.

It is an amenable number.

154540522321 is a deficient number, since it is larger than the sum of its proper divisors (1).

154540522321 is an equidigital number, since it uses as much as digits as its factorization.

154540522321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 154540522321 its reverse (123225045451), we get a palindrome (277765567772).

The spelling of 154540522321 in words is "one hundred fifty-four billion, five hundred forty million, five hundred twenty-two thousand, three hundred twenty-one".