155615151313 has 2 divisors, whose sum is σ = 155615151314. Its totient is φ = 155615151312.

The previous prime is 155615151311. The next prime is 155615151331. The reversal of 155615151313 is 313151516551.

Together with next prime (155615151331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103853441169 + 51761710144 = 322263^2 + 227512^2 .

It is a cyclic number.

It is not a de Polignac number, because 155615151313 - 2¹ = 155615151311 is a prime.

Together with 155615151311, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (155615151311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77807575656 + 77807575657.

It is an arithmetic number, because the mean of its divisors is an integer number (77807575657).

Almost surely, 2^155615151313 is an apocalyptic number.

It is an amenable number.

155615151313 is a deficient number, since it is larger than the sum of its proper divisors (1).

155615151313 is an equidigital number, since it uses as much as digits as its factorization.

155615151313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33750, while the sum is 37.

Adding to 155615151313 its reverse (313151516551), we get a palindrome (468766667864).

The spelling of 155615151313 in words is "one hundred fifty-five billion, six hundred fifteen million, one hundred fifty-one thousand, three hundred thirteen".