155241023 has 4 divisors (see below), whose sum is σ = 177418320. Its totient is φ = 133063728.

The previous prime is 155241019. The next prime is 155241067. The reversal of 155241023 is 320142551.

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

It is not a de Polignac number, because 155241023 - 2² = 155241019 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 155241023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155241323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11088638 + ... + 11088651.

It is an arithmetic number, because the mean of its divisors is an integer number (44354580).

Almost surely, 2^155241023 is an apocalyptic number.

155241023 is a deficient number, since it is larger than the sum of its proper divisors (22177297).

155241023 is an equidigital number, since it uses as much as digits as its factorization.

155241023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22177296.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 155241023 is about 12459.5755545685. The cubic root of 155241023 is about 537.4468213478.

Adding to 155241023 its reverse (320142551), we get a palindrome (475383574).

The spelling of 155241023 in words is "one hundred fifty-five million, two hundred forty-one thousand, twenty-three".