155142443 has 4 divisors (see below), whose sum is σ = 159335520. Its totient is φ = 150949368.

The previous prime is 155142433. The next prime is 155142451. The reversal of 155142443 is 344241551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 344241551 = 17 ⋅20249503.

It is a cyclic number.

It is not a de Polignac number, because 155142443 - 2²² = 150948139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155142433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2096483 + ... + 2096556.

It is an arithmetic number, because the mean of its divisors is an integer number (39833880).

Almost surely, 2^155142443 is an apocalyptic number.

155142443 is a deficient number, since it is larger than the sum of its proper divisors (4193077).

155142443 is an equidigital number, since it uses as much as digits as its factorization.

155142443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4193076.

The product of its digits is 9600, while the sum is 29.

The square root of 155142443 is about 12455.6189328351. The cubic root of 155142443 is about 537.3330354313. Note that the first 3 decimals are identical.

Adding to 155142443 its reverse (344241551), we get a palindrome (499383994).

The spelling of 155142443 in words is "one hundred fifty-five million, one hundred forty-two thousand, four hundred forty-three".