155434549 has 4 divisors (see below), whose sum is σ = 157623840. Its totient is φ = 153245260.

The previous prime is 155434541. The next prime is 155434561. The reversal of 155434549 is 945434551.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 155434549 - 2³ = 155434541 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155434541) 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, 1094539 + ... + 1094680.

It is an arithmetic number, because the mean of its divisors is an integer number (39405960).

Almost surely, 2^155434549 is an apocalyptic number.

It is an amenable number.

155434549 is a deficient number, since it is larger than the sum of its proper divisors (2189291).

155434549 is an equidigital number, since it uses as much as digits as its factorization.

155434549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189290.

The product of its digits is 216000, while the sum is 40.

The square root of 155434549 is about 12467.3392911238. The cubic root of 155434549 is about 537.6700586109.

The spelling of 155434549 in words is "one hundred fifty-five million, four hundred thirty-four thousand, five hundred forty-nine".