155322376421 has 2 divisors, whose sum is σ = 155322376422. Its totient is φ = 155322376420.

The previous prime is 155322376399. The next prime is 155322376441. The reversal of 155322376421 is 124673223551.

155322376421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139064851396 + 16257525025 = 372914^2 + 127505^2 .

It is a cyclic number.

It is not a de Polignac number, because 155322376421 - 2³⁰ = 154248634597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155322376441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77661188210 + 77661188211.

It is an arithmetic number, because the mean of its divisors is an integer number (77661188211).

Almost surely, 2^155322376421 is an apocalyptic number.

It is an amenable number.

155322376421 is a deficient number, since it is larger than the sum of its proper divisors (1).

155322376421 is an equidigital number, since it uses as much as digits as its factorization.

155322376421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 41.

Adding to 155322376421 its reverse (124673223551), we get a palindrome (279995599972).

The spelling of 155322376421 in words is "one hundred fifty-five billion, three hundred twenty-two million, three hundred seventy-six thousand, four hundred twenty-one".