155311045 has 4 divisors (see below), whose sum is σ = 186373260. Its totient is φ = 124248832.

The previous prime is 155311027. The next prime is 155311049. The reversal of 155311045 is 540113551.

It is a happy number.

155311045 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 94361796 + 60949249 = 9714^2 + 7807^2 .

It is a cyclic number.

It is not a de Polignac number, because 155311045 - 2⁷ = 155310917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155311049) 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, 15531100 + ... + 15531109.

It is an arithmetic number, because the mean of its divisors is an integer number (46593315).

Almost surely, 2^155311045 is an apocalyptic number.

It is an amenable number.

155311045 is a deficient number, since it is larger than the sum of its proper divisors (31062215).

155311045 is an equidigital number, since it uses as much as digits as its factorization.

155311045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31062214.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 155311045 is about 12462.3852050881. The cubic root of 155311045 is about 537.5276149504.

Adding to 155311045 its reverse (540113551), we get a palindrome (695424596).

The spelling of 155311045 in words is "one hundred fifty-five million, three hundred eleven thousand, forty-five".