155304133 has 4 divisors (see below), whose sum is σ = 159501580. Its totient is φ = 151106688.

The previous prime is 155304131. The next prime is 155304137. The reversal of 155304133 is 331403551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331403551 = 2593 ⋅127807.

It can be written as a sum of positive squares in 2 ways, for example, as 54863649 + 100440484 = 7407^2 + 10022^2 .

It is a cyclic number.

It is not a de Polignac number, because 155304133 - 2¹ = 155304131 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155304098 and 155304107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155304131) 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, 2098668 + ... + 2098741.

It is an arithmetic number, because the mean of its divisors is an integer number (39875395).

Almost surely, 2^155304133 is an apocalyptic number.

It is an amenable number.

155304133 is a deficient number, since it is larger than the sum of its proper divisors (4197447).

155304133 is an equidigital number, since it uses as much as digits as its factorization.

155304133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4197446.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 155304133 is about 12462.1078875124. The cubic root of 155304133 is about 537.5196407462.

Adding to 155304133 its reverse (331403551), we get a palindrome (486707684).

The spelling of 155304133 in words is "one hundred fifty-five million, three hundred four thousand, one hundred thirty-three".