215483266969 has 4 divisors (see below), whose sum is σ = 215490360420. Its totient is φ = 215476173520.

The previous prime is 215483266927. The next prime is 215483266987. The reversal of 215483266969 is 969662384512.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 82462588569 + 133020678400 = 287163^2 + 364720^2 .

It is a cyclic number.

It is not a de Polignac number, because 215483266969 - 2¹¹ = 215483264921 is a prime.

It is a super-2 number, since 2×215483266969² (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 (215483266909) 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, 3500962 + ... + 3561979.

It is an arithmetic number, because the mean of its divisors is an integer number (53872590105).

Almost surely, 2^215483266969 is an apocalyptic number.

It is an amenable number.

215483266969 is a deficient number, since it is larger than the sum of its proper divisors (7093451).

215483266969 is an equidigital number, since it uses as much as digits as its factorization.

215483266969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7093450.

The product of its digits is 33592320, while the sum is 61.

The spelling of 215483266969 in words is "two hundred fifteen billion, four hundred eighty-three million, two hundred sixty-six thousand, nine hundred sixty-nine".