155235013 has 2 divisors, whose sum is σ = 155235014. Its totient is φ = 155235012.

The previous prime is 155234977. The next prime is 155235019. The reversal of 155235013 is 310532551.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154803364 + 431649 = 12442^2 + 657^2 .

It is a cyclic number.

It is not a de Polignac number, because 155235013 - 2⁹ = 155234501 is a prime.

It is a super-2 number, since 2×155235013² = 48195818522220338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155235019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77617506 + 77617507.

It is an arithmetic number, because the mean of its divisors is an integer number (77617507).

Almost surely, 2^155235013 is an apocalyptic number.

It is an amenable number.

155235013 is a deficient number, since it is larger than the sum of its proper divisors (1).

155235013 is an equidigital number, since it uses as much as digits as its factorization.

155235013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 155235013 is about 12459.3343722688. The cubic root of 155235013 is about 537.4398856873.

Adding to 155235013 its reverse (310532551), we get a palindrome (465767564).

The spelling of 155235013 in words is "one hundred fifty-five million, two hundred thirty-five thousand, thirteen".