155215 has 8 divisors (see below), whose sum is σ = 191520. Its totient is φ = 120672.

The previous prime is 155209. The next prime is 155219. The reversal of 155215 is 512551.

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 155215 - 2⁷ = 155087 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155192 and 155201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155219) by changing a digit.

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, 235 + ... + 604.

It is an arithmetic number, because the mean of its divisors is an integer number (23940).

2¹⁵⁵²¹⁵ is an apocalyptic number.

155215 is a deficient number, since it is larger than the sum of its proper divisors (36305).

155215 is an equidigital number, since it uses as much as digits as its factorization.

155215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881.

The product of its digits is 250, while the sum is 19.

The square root of 155215 is about 393.9733493525. The cubic root of 155215 is about 53.7416788994.

Adding to 155215 its reverse (512551), we get a palindrome (667766).

The spelling of 155215 in words is "one hundred fifty-five thousand, two hundred fifteen".