155358563 has 4 divisors (see below), whose sum is σ = 164497320. Its totient is φ = 146219808.

The previous prime is 155358559. The next prime is 155358587. The reversal of 155358563 is 365853551.

It is a happy number.

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 155358563 - 2² = 155358559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155358563.

It is not an unprimeable number, because it can be changed into a prime (155357563) 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, 4569353 + ... + 4569386.

It is an arithmetic number, because the mean of its divisors is an integer number (41124330).

Almost surely, 2^155358563 is an apocalyptic number.

155358563 is a deficient number, since it is larger than the sum of its proper divisors (9138757).

155358563 is an equidigital number, since it uses as much as digits as its factorization.

155358563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9138756.

The product of its digits is 270000, while the sum is 41.

The square root of 155358563 is about 12464.2915161673. The cubic root of 155358563 is about 537.5824288943.

The spelling of 155358563 in words is "one hundred fifty-five million, three hundred fifty-eight thousand, five hundred sixty-three".