155230763213 has 2 divisors, whose sum is σ = 155230763214. Its totient is φ = 155230763212.

The previous prime is 155230763153. The next prime is 155230763243. The reversal of 155230763213 is 312367032551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154415203849 + 815559364 = 392957^2 + 28558^2 .

It is a cyclic number.

It is not a de Polignac number, because 155230763213 - 2²⁰ = 155229714637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155230763243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77615381606 + 77615381607.

It is an arithmetic number, because the mean of its divisors is an integer number (77615381607).

Almost surely, 2^155230763213 is an apocalyptic number.

It is an amenable number.

155230763213 is a deficient number, since it is larger than the sum of its proper divisors (1).

155230763213 is an equidigital number, since it uses as much as digits as its factorization.

155230763213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 113400, while the sum is 38.

Adding to 155230763213 its reverse (312367032551), we get a palindrome (467597795764).

The spelling of 155230763213 in words is "one hundred fifty-five billion, two hundred thirty million, seven hundred sixty-three thousand, two hundred thirteen".