155432755 has 4 divisors (see below), whose sum is σ = 186519312. Its totient is φ = 124346200.

The previous prime is 155432723. The next prime is 155432843. The reversal of 155432755 is 557234551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 557234551 = 17 ⋅32778503.

It is not a de Polignac number, because 155432755 - 2⁵ = 155432723 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15543271 + ... + 15543280.

It is an arithmetic number, because the mean of its divisors is an integer number (46629828).

Almost surely, 2^155432755 is an apocalyptic number.

155432755 is a deficient number, since it is larger than the sum of its proper divisors (31086557).

155432755 is an equidigital number, since it uses as much as digits as its factorization.

155432755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31086556.

The product of its digits is 105000, while the sum is 37.

The square root of 155432755 is about 12467.2673429264. The cubic root of 155432755 is about 537.6679900365.

The spelling of 155432755 in words is "one hundred fifty-five million, four hundred thirty-two thousand, seven hundred fifty-five".