155135389 has 4 divisors (see below), whose sum is σ = 155641024. Its totient is φ = 154629756.

The previous prime is 155135371. The next prime is 155135401. The reversal of 155135389 is 983531551.

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 155135389 - 2¹⁵ = 155102621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155135329) 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 in 3 ways as a sum of consecutive naturals, for example, 252357 + ... + 252970.

It is an arithmetic number, because the mean of its divisors is an integer number (38910256).

Almost surely, 2^155135389 is an apocalyptic number.

It is an amenable number.

155135389 is a deficient number, since it is larger than the sum of its proper divisors (505635).

155135389 is an equidigital number, since it uses as much as digits as its factorization.

155135389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505634.

The product of its digits is 81000, while the sum is 40.

The square root of 155135389 is about 12455.3357642418. The cubic root of 155135389 is about 537.3248915075.

It can be divided in two parts, 15513 and 5389, that added together give a palindrome (20902).

The spelling of 155135389 in words is "one hundred fifty-five million, one hundred thirty-five thousand, three hundred eighty-nine".