215453423 has 4 divisors (see below), whose sum is σ = 215561640. Its totient is φ = 215345208.

The previous prime is 215453417. The next prime is 215453437. The reversal of 215453423 is 324354512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 215453423 - 2²⁰ = 214404847 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 (215453453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51065 + ... + 55122.

It is an arithmetic number, because the mean of its divisors is an integer number (53890410).

Almost surely, 2^215453423 is an apocalyptic number.

215453423 is a deficient number, since it is larger than the sum of its proper divisors (108217).

215453423 is a wasteful number, since it uses less digits than its factorization.

215453423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108216.

The product of its digits is 14400, while the sum is 29.

The square root of 215453423 is about 14678.3317512584. The cubic root of 215453423 is about 599.4934827059.

The spelling of 215453423 in words is "two hundred fifteen million, four hundred fifty-three thousand, four hundred twenty-three".