215555520145 has 8 divisors (see below), whose sum is σ = 295618999104. Its totient is φ = 147809499504.

The previous prime is 215555520137. The next prime is 215555520221. The reversal of 215555520145 is 541025555512.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 215555520145 - 2³ = 215555520137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215555520098 and 215555520107.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3079364539 + ... + 3079364608.

It is an arithmetic number, because the mean of its divisors is an integer number (36952374888).

Almost surely, 2^215555520145 is an apocalyptic number.

It is an amenable number.

215555520145 is a deficient number, since it is larger than the sum of its proper divisors (80063478959).

215555520145 is an equidigital number, since it uses as much as digits as its factorization.

215555520145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6158729159.

The product of its (nonzero) digits is 250000, while the sum is 40.

The spelling of 215555520145 in words is "two hundred fifteen billion, five hundred fifty-five million, five hundred twenty thousand, one hundred forty-five".