155543013 has 12 divisors (see below), whose sum is σ = 237889548. Its totient is φ = 97595520.

The previous prime is 155542999. The next prime is 155543023. The reversal of 155543013 is 310345551.

155543013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 63728289 + 91814724 = 7983^2 + 9582^2 .

It is not a de Polignac number, because 155543013 - 2¹⁷ = 155411941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155543023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 508158 + ... + 508463.

It is an arithmetic number, because the mean of its divisors is an integer number (19824129).

Almost surely, 2^155543013 is an apocalyptic number.

It is an amenable number.

155543013 is a deficient number, since it is larger than the sum of its proper divisors (82346535).

155543013 is a wasteful number, since it uses less digits than its factorization.

155543013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016644 (or 1016641 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 155543013 is about 12471.6884582642. The cubic root of 155543013 is about 537.7950936303.

Adding to 155543013 its reverse (310345551), we get a palindrome (465888564).

The spelling of 155543013 in words is "one hundred fifty-five million, five hundred forty-three thousand, thirteen".