155235439 has 2 divisors, whose sum is σ = 155235440. Its totient is φ = 155235438.

The previous prime is 155235433. The next prime is 155235467. The reversal of 155235439 is 934532551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155235439 - 2¹¹ = 155233391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155235398 and 155235407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155235433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77617719 + 77617720.

It is an arithmetic number, because the mean of its divisors is an integer number (77617720).

Almost surely, 2^155235439 is an apocalyptic number.

155235439 is a deficient number, since it is larger than the sum of its proper divisors (1).

155235439 is an equidigital number, since it uses as much as digits as its factorization.

155235439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81000, while the sum is 37.

The square root of 155235439 is about 12459.3514678734. The cubic root of 155235439 is about 537.4403773058.

The spelling of 155235439 in words is "one hundred fifty-five million, two hundred thirty-five thousand, four hundred thirty-nine".