155112233 has 4 divisors (see below), whose sum is σ = 164236500. Its totient is φ = 145987968.

The previous prime is 155112211. The next prime is 155112241. The reversal of 155112233 is 332211551.

It is a happy number.

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 47720464 + 107391769 = 6908^2 + 10363^2 .

It is a cyclic number.

It is not a de Polignac number, because 155112233 - 2²⁶ = 88003369 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155112199 and 155112208.

It is not an unprimeable number, because it can be changed into a prime (155112283) 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, 4562108 + ... + 4562141.

It is an arithmetic number, because the mean of its divisors is an integer number (41059125).

Almost surely, 2^155112233 is an apocalyptic number.

It is an amenable number.

155112233 is a deficient number, since it is larger than the sum of its proper divisors (9124267).

155112233 is an equidigital number, since it uses as much as digits as its factorization.

155112233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9124266.

The product of its digits is 900, while the sum is 23.

The square root of 155112233 is about 12454.4061680997. The cubic root of 155112233 is about 537.2981559050.

Adding to 155112233 its reverse (332211551), we get a palindrome (487323784).

The spelling of 155112233 in words is "one hundred fifty-five million, one hundred twelve thousand, two hundred thirty-three".