215500604673 has 4 divisors (see below), whose sum is σ = 287334139568. Its totient is φ = 143667069780.

The previous prime is 215500604651. The next prime is 215500604687. The reversal of 215500604673 is 376406005512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 215500604673 - 2³³ = 206910670081 is a prime.

It is a super-2 number, since 2×215500604673² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (215500604173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35916767443 + ... + 35916767448.

It is an arithmetic number, because the mean of its divisors is an integer number (71833534892).

Almost surely, 2^215500604673 is an apocalyptic number.

It is an amenable number.

215500604673 is a deficient number, since it is larger than the sum of its proper divisors (71833534895).

215500604673 is an equidigital number, since it uses as much as digits as its factorization.

215500604673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71833534894.

The product of its (nonzero) digits is 151200, while the sum is 39.

The spelling of 215500604673 in words is "two hundred fifteen billion, five hundred million, six hundred four thousand, six hundred seventy-three".