155234209 has 8 divisors (see below), whose sum is σ = 168739200. Its totient is φ = 141952656.

The previous prime is 155234207. The next prime is 155234239. The reversal of 155234209 is 902432551.

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

It is a cyclic number.

It is not a de Polignac number, because 155234209 - 2¹ = 155234207 is a prime.

It is a super-4 number, since 4×155234209⁴ (a number of 34 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155234201) 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, 54409 + ... + 57190.

It is an arithmetic number, because the mean of its divisors is an integer number (21092400).

Almost surely, 2^155234209 is an apocalyptic number.

It is an amenable number.

155234209 is a deficient number, since it is larger than the sum of its proper divisors (13504991).

155234209 is a wasteful number, since it uses less digits than its factorization.

155234209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111719.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 155234209 is about 12459.3021072611. The cubic root of 155234209 is about 537.4389578417.

The spelling of 155234209 in words is "one hundred fifty-five million, two hundred thirty-four thousand, two hundred nine".