215882352961 has 4 divisors (see below), whose sum is σ = 235508021424. Its totient is φ = 196256684500.

The previous prime is 215882352941. The next prime is 215882352971. The reversal of 215882352961 is 169253288512.

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 a cyclic number.

It is not a de Polignac number, because 215882352961 - 2²⁷ = 215748135233 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 215882352899 and 215882352908.

It is not an unprimeable number, because it can be changed into a prime (215882352941) 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, 9812834215 + ... + 9812834236.

It is an arithmetic number, because the mean of its divisors is an integer number (58877005356).

Almost surely, 2^215882352961 is an apocalyptic number.

It is an amenable number.

215882352961 is a deficient number, since it is larger than the sum of its proper divisors (19625668463).

215882352961 is a wasteful number, since it uses less digits than its factorization.

215882352961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19625668462.

The product of its digits is 2073600, while the sum is 52.

The spelling of 215882352961 in words is "two hundred fifteen billion, eight hundred eighty-two million, three hundred fifty-two thousand, nine hundred sixty-one".