153243541021 has 2 divisors, whose sum is σ = 153243541022. Its totient is φ = 153243541020.

The previous prime is 153243541001. The next prime is 153243541039. The reversal of 153243541021 is 120145342351.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118946352996 + 34297188025 = 344886^2 + 185195^2 .

It is a cyclic number.

It is not a de Polignac number, because 153243541021 - 2¹³ = 153243532829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (153243541001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76621770510 + 76621770511.

It is an arithmetic number, because the mean of its divisors is an integer number (76621770511).

Almost surely, 2^153243541021 is an apocalyptic number.

It is an amenable number.

153243541021 is a deficient number, since it is larger than the sum of its proper divisors (1).

153243541021 is an equidigital number, since it uses as much as digits as its factorization.

153243541021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 153243541021 its reverse (120145342351), we get a palindrome (273388883372).

The spelling of 153243541021 in words is "one hundred fifty-three billion, two hundred forty-three million, five hundred forty-one thousand, twenty-one".