217421477348 has 24 divisors (see below), whose sum is σ = 381350895744. Its totient is φ = 108464335200.

The previous prime is 217421477263. The next prime is 217421477389. The reversal of 217421477348 is 843774124712.

It is a super-2 number, since 2×217421477348² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 217421477296 and 217421477305.

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, 3464933 + ... + 3527123.

It is an arithmetic number, because the mean of its divisors is an integer number (15889620656).

Almost surely, 2^217421477348 is an apocalyptic number.

It is an amenable number.

217421477348 is a deficient number, since it is larger than the sum of its proper divisors (163929418396).

217421477348 is a wasteful number, since it uses less digits than its factorization.

217421477348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64163 (or 64161 counting only the distinct ones).

The product of its digits is 2107392, while the sum is 50.

The spelling of 217421477348 in words is "two hundred seventeen billion, four hundred twenty-one million, four hundred seventy-seven thousand, three hundred forty-eight".