155412239 has 2 divisors, whose sum is σ = 155412240. Its totient is φ = 155412238.

The previous prime is 155412233. The next prime is 155412241. The reversal of 155412239 is 932214551.

155412239 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155412239 - 2²⁴ = 138635023 is a prime.

Together with 155412241, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155412233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77706119 + 77706120.

It is an arithmetic number, because the mean of its divisors is an integer number (77706120).

Almost surely, 2^155412239 is an apocalyptic number.

155412239 is a deficient number, since it is larger than the sum of its proper divisors (1).

155412239 is an equidigital number, since it uses as much as digits as its factorization.

155412239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 32.

The square root of 155412239 is about 12466.4445211937. Note that the first 3 decimals coincide. The cubic root of 155412239 is about 537.6443328997.

The spelling of 155412239 in words is "one hundred fifty-five million, four hundred twelve thousand, two hundred thirty-nine".