215143121171 has 8 divisors (see below), whose sum is σ = 235152075888. Its totient is φ = 195209248000.

The previous prime is 215143121153. The next prime is 215143121177. The reversal of 215143121171 is 171121341512.

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 215143121171 - 2³⁰ = 214069379347 is a prime.

It is a super-2 number, since 2×215143121171² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215143121177) 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, 18764390 + ... + 18775851.

It is an arithmetic number, because the mean of its divisors is an integer number (29394009486).

Almost surely, 2^215143121171 is an apocalyptic number.

215143121171 is a deficient number, since it is larger than the sum of its proper divisors (20008954717).

215143121171 is a wasteful number, since it uses less digits than its factorization.

215143121171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37540773.

The product of its digits is 1680, while the sum is 29.

Adding to 215143121171 its reverse (171121341512), we get a palindrome (386264462683).

The spelling of 215143121171 in words is "two hundred fifteen billion, one hundred forty-three million, one hundred twenty-one thousand, one hundred seventy-one".