155040335321 has 4 divisors (see below), whose sum is σ = 159230614692. Its totient is φ = 150850055952.

The previous prime is 155040335251. The next prime is 155040335323. The reversal of 155040335321 is 123533040551.

155040335321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 134791045321 + 20249290000 = 367139^2 + 142300^2 .

It is a cyclic number.

It is not a de Polignac number, because 155040335321 - 2¹⁰ = 155040334297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155040335323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2095139630 + ... + 2095139703.

It is an arithmetic number, because the mean of its divisors is an integer number (39807653673).

Almost surely, 2^155040335321 is an apocalyptic number.

It is an amenable number.

155040335321 is a deficient number, since it is larger than the sum of its proper divisors (4190279371).

155040335321 is an equidigital number, since it uses as much as digits as its factorization.

155040335321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4190279370.

The product of its (nonzero) digits is 27000, while the sum is 32.

Adding to 155040335321 its reverse (123533040551), we get a palindrome (278573375872).

The spelling of 155040335321 in words is "one hundred fifty-five billion, forty million, three hundred thirty-five thousand, three hundred twenty-one".