155130235321 has 2 divisors, whose sum is σ = 155130235322. Its totient is φ = 155130235320.

The previous prime is 155130235301. The next prime is 155130235339. The reversal of 155130235321 is 123532031551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86362515625 + 68767719696 = 293875^2 + 262236^2 .

It is a cyclic number.

It is not a de Polignac number, because 155130235321 - 2¹³ = 155130227129 is a prime.

It is not a weakly prime, because it can be changed into another prime (155130235301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77565117660 + 77565117661.

It is an arithmetic number, because the mean of its divisors is an integer number (77565117661).

Almost surely, 2^155130235321 is an apocalyptic number.

It is an amenable number.

155130235321 is a deficient number, since it is larger than the sum of its proper divisors (1).

155130235321 is an equidigital number, since it uses as much as digits as its factorization.

155130235321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13500, while the sum is 31.

Adding to 155130235321 its reverse (123532031551), we get a palindrome (278662266872).

The spelling of 155130235321 in words is "one hundred fifty-five billion, one hundred thirty million, two hundred thirty-five thousand, three hundred twenty-one".