215604493 has 8 divisors (see below), whose sum is σ = 235460736. Its totient is φ = 196215600.

The previous prime is 215604491. The next prime is 215604503. The reversal of 215604493 is 394406512.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 215604493 - 2¹ = 215604491 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 (215604491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115873 + ... + 117718.

It is an arithmetic number, because the mean of its divisors is an integer number (29432592).

Almost surely, 2^215604493 is an apocalyptic number.

It is an amenable number.

215604493 is a deficient number, since it is larger than the sum of its proper divisors (19856243).

215604493 is a wasteful number, since it uses less digits than its factorization.

215604493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233675.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 215604493 is about 14683.4768702784. The cubic root of 215604493 is about 599.6335660707.

The spelling of 215604493 in words is "two hundred fifteen million, six hundred four thousand, four hundred ninety-three".