155512133 has 6 divisors (see below), whose sum is σ = 180901926. Its totient is φ = 133296072.

The previous prime is 155512117. The next prime is 155512183. The reversal of 155512133 is 331215551.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 136002244 + 19509889 = 11662^2 + 4417^2 .

It is not a de Polignac number, because 155512133 - 2⁴ = 155512117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155512183) 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 5 ways as a sum of consecutive naturals, for example, 1586810 + ... + 1586907.

It is an arithmetic number, because the mean of its divisors is an integer number (30150321).

Almost surely, 2^155512133 is an apocalyptic number.

It is an amenable number.

155512133 is a deficient number, since it is larger than the sum of its proper divisors (25389793).

155512133 is an equidigital number, since it uses as much as digits as its factorization.

155512133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3173731 (or 3173724 counting only the distinct ones).

The product of its digits is 2250, while the sum is 26.

The square root of 155512133 is about 12470.4503928286. The cubic root of 155512133 is about 537.7595017356.

Adding to 155512133 its reverse (331215551), we get a palindrome (486727684).

The spelling of 155512133 in words is "one hundred fifty-five million, five hundred twelve thousand, one hundred thirty-three".