215230155 has 32 divisors (see below), whose sum is σ = 401946624. Its totient is φ = 96295296.

The previous prime is 215230153. The next prime is 215230187. The reversal of 215230155 is 551032512.

It is a happy number.

215230155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 215230155 - 2¹ = 215230153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215230153) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16872 + ... + 26741.

It is an arithmetic number, because the mean of its divisors is an integer number (12560832).

Almost surely, 2^215230155 is an apocalyptic number.

215230155 is a deficient number, since it is larger than the sum of its proper divisors (186716469).

215230155 is a wasteful number, since it uses less digits than its factorization.

215230155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43675.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 215230155 is about 14670.7244197415. The cubic root of 215230155 is about 599.2863320221.

Adding to 215230155 its reverse (551032512), we get a palindrome (766262667).

The spelling of 215230155 in words is "two hundred fifteen million, two hundred thirty thousand, one hundred fifty-five".