155023239 has 16 divisors (see below), whose sum is σ = 236400128. Its totient is φ = 88519392.

The previous prime is 155023217. The next prime is 155023247. The reversal of 155023239 is 932320551.

It is not a de Polignac number, because 155023239 - 2⁵ = 155023207 is a prime.

It is a super-2 number, since 2×155023239² = 48064409260102242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155023259) 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 15 ways as a sum of consecutive naturals, for example, 52254 + ... + 55140.

It is an arithmetic number, because the mean of its divisors is an integer number (14775008).

Almost surely, 2^155023239 is an apocalyptic number.

155023239 is a deficient number, since it is larger than the sum of its proper divisors (81376889).

155023239 is a wasteful number, since it uses less digits than its factorization.

155023239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5454.

The product of its (nonzero) digits is 8100, while the sum is 30.

The square root of 155023239 is about 12450.8328637084. The cubic root of 155023239 is about 537.1953798725.

The spelling of 155023239 in words is "one hundred fifty-five million, twenty-three thousand, two hundred thirty-nine".