155316215 has 16 divisors (see below), whose sum is σ = 192142368. Its totient is φ = 120454656.

The previous prime is 155316211. The next prime is 155316221. The reversal of 155316215 is 512613551.

It is a cyclic number.

It is not a de Polignac number, because 155316215 - 2² = 155316211 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 (155316211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26819 + ... + 32091.

It is an arithmetic number, because the mean of its divisors is an integer number (12008898).

Almost surely, 2^155316215 is an apocalyptic number.

155316215 is a deficient number, since it is larger than the sum of its proper divisors (36826153).

155316215 is a wasteful number, since it uses less digits than its factorization.

155316215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5458.

The product of its digits is 4500, while the sum is 29.

The square root of 155316215 is about 12462.5926275394. The cubic root of 155316215 is about 537.5335792975.

Adding to 155316215 its reverse (512613551), we get a palindrome (667929766).

The spelling of 155316215 in words is "one hundred fifty-five million, three hundred sixteen thousand, two hundred fifteen".