155205449 has 8 divisors (see below), whose sum is σ = 185089920. Its totient is φ = 127249056.

The previous prime is 155205443. The next prime is 155205451. The reversal of 155205449 is 944502551.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155205449 - 2¹⁶ = 155139913 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (155205443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481844 + ... + 482165.

It is an arithmetic number, because the mean of its divisors is an integer number (23136240).

Almost surely, 2^155205449 is an apocalyptic number.

It is an amenable number.

155205449 is a deficient number, since it is larger than the sum of its proper divisors (29884471).

155205449 is an equidigital number, since it uses as much as digits as its factorization.

155205449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964039.

The product of its (nonzero) digits is 36000, while the sum is 35.

The square root of 155205449 is about 12458.1478960558. The cubic root of 155205449 is about 537.4057656323.

The spelling of 155205449 in words is "one hundred fifty-five million, two hundred five thousand, four hundred forty-nine".