155223215 has 8 divisors (see below), whose sum is σ = 212877600. Its totient is φ = 106438752.

The previous prime is 155223203. The next prime is 155223221. The reversal of 155223215 is 512322551.

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

It is not a de Polignac number, because 155223215 - 2⁶ = 155223151 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2217440 + ... + 2217509.

It is an arithmetic number, because the mean of its divisors is an integer number (26609700).

Almost surely, 2^155223215 is an apocalyptic number.

155223215 is a deficient number, since it is larger than the sum of its proper divisors (57654385).

155223215 is an equidigital number, since it uses as much as digits as its factorization.

155223215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4434961.

The product of its digits is 3000, while the sum is 26.

The square root of 155223215 is about 12458.8609029879. The cubic root of 155223215 is about 537.4262700382.

Adding to 155223215 its reverse (512322551), we get a palindrome (667545766).

The spelling of 155223215 in words is "one hundred fifty-five million, two hundred twenty-three thousand, two hundred fifteen".