155102223 has 4 divisors (see below), whose sum is σ = 206802968. Its totient is φ = 103401480.

The previous prime is 155102197. The next prime is 155102239. The reversal of 155102223 is 322201551.

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

It is not a de Polignac number, because 155102223 - 2⁵ = 155102191 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 155102223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155102273) 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, 25850368 + ... + 25850373.

It is an arithmetic number, because the mean of its divisors is an integer number (51700742).

Almost surely, 2^155102223 is an apocalyptic number.

155102223 is a deficient number, since it is larger than the sum of its proper divisors (51700745).

155102223 is an equidigital number, since it uses as much as digits as its factorization.

155102223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51700744.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 155102223 is about 12454.0042958078. The cubic root of 155102223 is about 537.2865976715.

Adding to 155102223 its reverse (322201551), we get a palindrome (477303774).

It can be divided in two parts, 155 and 102223, that added together give a triangular number (102378 = T₄₅₂).

The spelling of 155102223 in words is "one hundred fifty-five million, one hundred two thousand, two hundred twenty-three".