155022233 has 4 divisors (see below), whose sum is σ = 155092020. Its totient is φ = 154952448.

The previous prime is 155022229. The next prime is 155022293. The reversal of 155022233 is 332220551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 332220551 = 13 ⋅25555427.

It can be written as a sum of positive squares in 2 ways, for example, as 26245129 + 128777104 = 5123^2 + 11348^2 .

It is a cyclic number.

It is not a de Polignac number, because 155022233 - 2² = 155022229 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 = 155022199 and 155022208.

It is not an unprimeable number, because it can be changed into a prime (155022223) 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, 31448 + ... + 36041.

It is an arithmetic number, because the mean of its divisors is an integer number (38773005).

Almost surely, 2^155022233 is an apocalyptic number.

It is an amenable number.

155022233 is a deficient number, since it is larger than the sum of its proper divisors (69787).

155022233 is an equidigital number, since it uses as much as digits as its factorization.

155022233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69786.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 155022233 is about 12450.7924647389. The cubic root of 155022233 is about 537.1942178538.

Adding to 155022233 its reverse (332220551), we get a palindrome (487242784).

The spelling of 155022233 in words is "one hundred fifty-five million, twenty-two thousand, two hundred thirty-three".