215289353295121 has 16 divisors (see below), whose sum is σ = 251349352646400. Its totient is φ = 184325688597120.

The previous prime is 215289353295113. The next prime is 215289353295131. The reversal of 215289353295121 is 121592353982512.

It is a happy number.

It is not a de Polignac number, because 215289353295121 - 2³ = 215289353295113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215289353295131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 353509600 + ... + 354118081.

It is an arithmetic number, because the mean of its divisors is an integer number (15709334540400).

Almost surely, 2^{215289353295121} is an apocalyptic number.

It is an amenable number.

215289353295121 is a deficient number, since it is larger than the sum of its proper divisors (36059999351279).

215289353295121 is an frugal number, since it uses more digits than its factorization.

215289353295121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707628589 (or 707628575 counting only the distinct ones).

The product of its digits is 11664000, while the sum is 58.

The spelling of 215289353295121 in words is "two hundred fifteen trillion, two hundred eighty-nine billion, three hundred fifty-three million, two hundred ninety-five thousand, one hundred twenty-one".