155215233 has 12 divisors (see below), whose sum is σ = 231432448. Its totient is φ = 100138680.

The previous prime is 155215231. The next prime is 155215241. The reversal of 155215233 is 332512551.

It is a happy number.

It is not a de Polignac number, because 155215233 - 2¹ = 155215231 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 155215197 and 155215206.

It is not an unprimeable number, because it can be changed into a prime (155215231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 277885 + ... + 278442.

Almost surely, 2^155215233 is an apocalyptic number.

It is an amenable number.

155215233 is a deficient number, since it is larger than the sum of its proper divisors (76217215).

155215233 is a wasteful number, since it uses less digits than its factorization.

155215233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556364 (or 556361 counting only the distinct ones).

The product of its digits is 4500, while the sum is 27.

The square root of 155215233 is about 12458.5405646087. The cubic root of 155215233 is about 537.4170579067.

Adding to 155215233 its reverse (332512551), we get a palindrome (487727784).

The spelling of 155215233 in words is "one hundred fifty-five million, two hundred fifteen thousand, two hundred thirty-three".