215532423 has 12 divisors (see below), whose sum is σ = 311850448. Its totient is φ = 143445600.

The previous prime is 215532419. The next prime is 215532431. The reversal of 215532423 is 324235512.

It is a happy number.

215532423 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 215532423 - 2² = 215532419 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 (215532403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14515 + ... + 25332.

Almost surely, 2^215532423 is an apocalyptic number.

215532423 is a deficient number, since it is larger than the sum of its proper divisors (96318025).

215532423 is a wasteful number, since it uses less digits than its factorization.

215532423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40454 (or 40451 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 215532423 is about 14681.0225461308. The cubic root of 215532423 is about 599.5667455596.

Adding to 215532423 its reverse (324235512), we get a palindrome (539767935).

The spelling of 215532423 in words is "two hundred fifteen million, five hundred thirty-two thousand, four hundred twenty-three".