155135439 has 32 divisors (see below), whose sum is σ = 240588800. Its totient is φ = 98677440.

The previous prime is 155135423. The next prime is 155135459. The reversal of 155135439 is 934531551.

It is a happy number.

It is not a de Polignac number, because 155135439 - 2⁴ = 155135423 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155135419) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59832 + ... + 62370.

It is an arithmetic number, because the mean of its divisors is an integer number (7518400).

Almost surely, 2^155135439 is an apocalyptic number.

155135439 is a deficient number, since it is larger than the sum of its proper divisors (85453361).

155135439 is a wasteful number, since it uses less digits than its factorization.

155135439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2652 (or 2646 counting only the distinct ones).

The product of its digits is 40500, while the sum is 36.

The square root of 155135439 is about 12455.3377714135. The cubic root of 155135439 is about 537.3249492340.

The spelling of 155135439 in words is "one hundred fifty-five million, one hundred thirty-five thousand, four hundred thirty-nine".