155541803 has 4 divisors (see below), whose sum is σ = 158476608. Its totient is φ = 152607000.

The previous prime is 155541791. The next prime is 155541811. The reversal of 155541803 is 308145551.

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 155541803 - 2⁶ = 155541739 is a prime.

It is a super-3 number, since 3×155541803³ (a number of 26 digits) contains 333 as substring.

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 155541803.

It is not an unprimeable number, because it can be changed into a prime (155541833) 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, 1467323 + ... + 1467428.

It is an arithmetic number, because the mean of its divisors is an integer number (39619152).

Almost surely, 2^155541803 is an apocalyptic number.

155541803 is a deficient number, since it is larger than the sum of its proper divisors (2934805).

155541803 is an equidigital number, since it uses as much as digits as its factorization.

155541803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2934804.

The product of its (nonzero) digits is 12000, while the sum is 32.

The square root of 155541803 is about 12471.6399482987. The cubic root of 155541803 is about 537.7936990884.

The spelling of 155541803 in words is "one hundred fifty-five million, five hundred forty-one thousand, eight hundred three".