155413613 has 4 divisors (see below), whose sum is σ = 155846880. Its totient is φ = 154980348.

The previous prime is 155413607. The next prime is 155413637. The reversal of 155413613 is 316314551.

155413613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 155413613 - 2⁶ = 155413549 is a prime.

It is a super-3 number, since 3×155413613³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155413663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 216095 + ... + 216812.

It is an arithmetic number, because the mean of its divisors is an integer number (38961720).

Almost surely, 2^155413613 is an apocalyptic number.

It is an amenable number.

155413613 is a deficient number, since it is larger than the sum of its proper divisors (433267).

155413613 is an equidigital number, since it uses as much as digits as its factorization.

155413613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433266.

The product of its digits is 5400, while the sum is 29.

The square root of 155413613 is about 12466.4996290057. The cubic root of 155413613 is about 537.6459173333.

The spelling of 155413613 in words is "one hundred fifty-five million, four hundred thirteen thousand, six hundred thirteen".