155222233 has 4 divisors (see below), whose sum is σ = 156355380. Its totient is φ = 154089088.

The previous prime is 155222173. The next prime is 155222237. The reversal of 155222233 is 332222551.

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 127057984 + 28164249 = 11272^2 + 5307^2 .

It is a cyclic number.

It is not a de Polignac number, because 155222233 - 2¹³ = 155214041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155222198 and 155222207.

It is not an unprimeable number, because it can be changed into a prime (155222237) 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, 566368 + ... + 566641.

It is an arithmetic number, because the mean of its divisors is an integer number (39088845).

Almost surely, 2^155222233 is an apocalyptic number.

It is an amenable number.

155222233 is a deficient number, since it is larger than the sum of its proper divisors (1133147).

155222233 is a wasteful number, since it uses less digits than its factorization.

155222233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133146.

The product of its digits is 3600, while the sum is 25.

The square root of 155222233 is about 12458.8214932232. The cubic root of 155222233 is about 537.4251367161.

Adding to 155222233 its reverse (332222551), we get a palindrome (487444784).

The spelling of 155222233 in words is "one hundred fifty-five million, two hundred twenty-two thousand, two hundred thirty-three".