155532143 has 4 divisors (see below), whose sum is σ = 167496168. Its totient is φ = 143568120.

The previous prime is 155532137. The next prime is 155532173. The reversal of 155532143 is 341235551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155532143 - 2⁶ = 155532079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155532173) 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, 5981993 + ... + 5982018.

It is an arithmetic number, because the mean of its divisors is an integer number (41874042).

Almost surely, 2^155532143 is an apocalyptic number.

155532143 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

155532143 is a deficient number, since it is larger than the sum of its proper divisors (11964025).

155532143 is a wasteful number, since it uses less digits than its factorization.

155532143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11964024.

The product of its digits is 9000, while the sum is 29.

The square root of 155532143 is about 12471.2526636261. The cubic root of 155532143 is about 537.7825655441.

Adding to 155532143 its reverse (341235551), we get a palindrome (496767694).

The spelling of 155532143 in words is "one hundred fifty-five million, five hundred thirty-two thousand, one hundred forty-three".