155313223 has 8 divisors (see below), whose sum is σ = 167550768. Its totient is φ = 143117184.

The previous prime is 155313217. The next prime is 155313229. The reversal of 155313223 is 322313551.

It is an interprime number because it is at equal distance from previous prime (155313217) and next prime (155313229).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155313223 - 2¹⁷ = 155182151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155313229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2365 + ... + 17782.

It is an arithmetic number, because the mean of its divisors is an integer number (20943846).

Almost surely, 2^155313223 is an apocalyptic number.

155313223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

155313223 is a deficient number, since it is larger than the sum of its proper divisors (12237545).

155313223 is a wasteful number, since it uses less digits than its factorization.

155313223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20753.

The product of its digits is 2700, while the sum is 25.

The square root of 155313223 is about 12462.4725877331. The cubic root of 155313223 is about 537.5301276064.

Adding to 155313223 its reverse (322313551), we get a palindrome (477626774).

The spelling of 155313223 in words is "one hundred fifty-five million, three hundred thirteen thousand, two hundred twenty-three".