155002223 has 4 divisors (see below), whose sum is σ = 155243928. Its totient is φ = 154760520.

The previous prime is 155002163. The next prime is 155002231. The reversal of 155002223 is 322200551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155002223 - 2¹⁰ = 155001199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 155002195 and 155002204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155005223) 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, 119888 + ... + 121173.

It is an arithmetic number, because the mean of its divisors is an integer number (38810982).

Almost surely, 2^155002223 is an apocalyptic number.

155002223 is a deficient number, since it is larger than the sum of its proper divisors (241705).

155002223 is an equidigital number, since it uses as much as digits as its factorization.

155002223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241704.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 155002223 is about 12449.9888754970. The cubic root of 155002223 is about 537.1711034944.

Adding to 155002223 its reverse (322200551), we get a palindrome (477202774).

The spelling of 155002223 in words is "one hundred fifty-five million, two thousand, two hundred twenty-three".