155235409 has 8 divisors (see below), whose sum is σ = 178314048. Its totient is φ = 132382320.

The previous prime is 155235403. The next prime is 155235413. The reversal of 155235409 is 904532551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 155235409 - 2³ = 155235401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155235401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54907 + ... + 57664.

It is an arithmetic number, because the mean of its divisors is an integer number (22289256).

Almost surely, 2^155235409 is an apocalyptic number.

It is an amenable number.

155235409 is a deficient number, since it is larger than the sum of its proper divisors (23078639).

155235409 is a wasteful number, since it uses less digits than its factorization.

155235409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112775.

The product of its (nonzero) digits is 27000, while the sum is 34.

The square root of 155235409 is about 12459.3502639584. The cubic root of 155235409 is about 537.4403426848.

The spelling of 155235409 in words is "one hundred fifty-five million, two hundred thirty-five thousand, four hundred nine".