155215313 has 8 divisors (see below), whose sum is σ = 178237920. Its totient is φ = 133678080.

The previous prime is 155215297. The next prime is 155215343. The reversal of 155215313 is 313512551.

It is a happy number.

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 155215313 - 2⁴ = 155215297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155215343) 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, 371120 + ... + 371537.

It is an arithmetic number, because the mean of its divisors is an integer number (22279740).

Almost surely, 2^155215313 is an apocalyptic number.

It is an amenable number.

155215313 is a deficient number, since it is larger than the sum of its proper divisors (23022607).

155215313 is a wasteful number, since it uses less digits than its factorization.

155215313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 742687.

The product of its digits is 2250, while the sum is 26.

The square root of 155215313 is about 12458.5437752572. The cubic root of 155215313 is about 537.4171502373.

Adding to 155215313 its reverse (313512551), we get a palindrome (468727864).

The spelling of 155215313 in words is "one hundred fifty-five million, two hundred fifteen thousand, three hundred thirteen".